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20010112511 = 1031671163311
BaseRepresentation
bin10010101000101100…
…100001010111111111
31220122112120001000012
4102220230201113333
5311440042100021
613105330053435
71305604102304
oct225054412777
956575501005
1020010112511
118539206774
123a6541a27b
131b6b80877c
14d7b7990ab
157c1ab735b
hex4a8b215ff

20010112511 has 8 divisors (see below), whose sum is σ = 20325387264. Its totient is φ = 19697164920.

The previous prime is 20010112489. The next prime is 20010112513. The reversal of 20010112511 is 11521101002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-20010112511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010112513) 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, 564455 + ... + 598856.

It is an arithmetic number, because the mean of its divisors is an integer number (2540673408).

Almost surely, 220010112511 is an apocalyptic number.

20010112511 is a deficient number, since it is larger than the sum of its proper divisors (315274753).

20010112511 is a wasteful number, since it uses less digits than its factorization.

20010112511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163581.

The product of its (nonzero) digits is 20, while the sum is 14.

Adding to 20010112511 its reverse (11521101002), we get a palindrome (31531213513).

The spelling of 20010112511 in words is "twenty billion, ten million, one hundred twelve thousand, five hundred eleven".

Divisors: 1 103 167 17201 1163311 119821033 194272937 20010112511