20152355631 has 4 divisors (see below), whose sum is σ = 26869807512. Its totient is φ = 13434903752.

The previous prime is 20152355623. The next prime is 20152355633. The reversal of 20152355631 is 13655325102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20152355631 - 2³ = 20152355623 is a prime.

It is a super-2 number, since 2×20152355631² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20152355592 and 20152355601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20152355633) 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 3 ways as a sum of consecutive naturals, for example, 3358725936 + ... + 3358725941.

It is an arithmetic number, because the mean of its divisors is an integer number (6717451878).

Almost surely, 2^20152355631 is an apocalyptic number.

20152355631 is a deficient number, since it is larger than the sum of its proper divisors (6717451881).

20152355631 is an equidigital number, since it uses as much as digits as its factorization.

20152355631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6717451880.

The product of its (nonzero) digits is 27000, while the sum is 33.

The spelling of 20152355631 in words is "twenty billion, one hundred fifty-two million, three hundred fifty-five thousand, six hundred thirty-one".