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20011220103 = 372613222073
BaseRepresentation
bin10010101000110000…
…101111110010000111
31220122121122022100010
4102220300233302013
5311440333020403
613105405521303
71305616364400
oct225060576207
956577568303
1020011220103
1185398a2936
123a65873233
131b6bb05954
14d7b9a69a7
157c1c35603
hex4a8c2fc87

20011220103 has 24 divisors (see below), whose sum is σ = 31088583408. Its totient is φ = 11416277376.

The previous prime is 20011220093. The next prime is 20011220113. The reversal of 20011220103 is 30102211002.

It is an interprime number because it is at equal distance from previous prime (20011220093) and next prime (20011220113).

It is not a de Polignac number, because 20011220103 - 28 = 20011219847 is a prime.

It is a super-2 number, since 2×200112201032 (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011220113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20926 + ... + 201147.

It is an arithmetic number, because the mean of its divisors is an integer number (1295357642).

Almost surely, 220011220103 is an apocalyptic number.

20011220103 is a deficient number, since it is larger than the sum of its proper divisors (11077363305).

20011220103 is a wasteful number, since it uses less digits than its factorization.

20011220103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222703 (or 222696 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20011220103 its reverse (30102211002), we get a palindrome (50113431105).

The spelling of 20011220103 in words is "twenty billion, eleven million, two hundred twenty thousand, one hundred three".

Divisors: 1 3 7 21 49 147 613 1839 4291 12873 30037 90111 222073 666219 1554511 4663533 10881577 32644731 136130749 408392247 952915243 2858745729 6670406701 20011220103