20152621255 has 16 divisors (see below), whose sum is σ = 26093418624. Its totient is φ = 14853346560.

The previous prime is 20152621213. The next prime is 20152621259. The reversal of 20152621255 is 55212625102.

It is a happy number.

It is not a de Polignac number, because 20152621255 - 2⁷ = 20152621127 is a prime.

It is a super-2 number, since 2×20152621255² (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 (20152621259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263679 + ... + 331408.

It is an arithmetic number, because the mean of its divisors is an integer number (1630838664).

Almost surely, 2^20152621255 is an apocalyptic number.

20152621255 is a deficient number, since it is larger than the sum of its proper divisors (5940797369).

20152621255 is a wasteful number, since it uses less digits than its factorization.

20152621255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595626.

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 20152621255 in words is "twenty billion, one hundred fifty-two million, six hundred twenty-one thousand, two hundred fifty-five".