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20011220094 = 2318691178439
BaseRepresentation
bin10010101000110000…
…101111110001111110
31220122121122022022210
4102220300233301332
5311440333020334
613105405521250
71305616364355
oct225060576176
956577568283
1020011220094
1185398a2928
123a65873226
131b6bb05948
14d7b9a699c
157c1c355e9
hex4a8c2fc7e

20011220094 has 16 divisors (see below), whose sum is σ = 40024805760. Its totient is φ = 6670012440.

The previous prime is 20011220093. The next prime is 20011220113. The reversal of 20011220094 is 49002211002.

It is a self number, because there is not a number n which added to its sum of digits gives 20011220094.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011220093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22927 + ... + 201365.

It is an arithmetic number, because the mean of its divisors is an integer number (2501550360).

Almost surely, 220011220094 is an apocalyptic number.

20011220094 is an abundant number, since it is smaller than the sum of its proper divisors (20013585666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20011220094 is a wasteful number, since it uses less digits than its factorization.

20011220094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197135.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 20011220094 its reverse (49002211002), we get a palindrome (69013431096).

The spelling of 20011220094 in words is "twenty billion, eleven million, two hundred twenty thousand, ninety-four".

Divisors: 1 2 3 6 18691 37382 56073 112146 178439 356878 535317 1070634 3335203349 6670406698 10005610047 20011220094