20525000831 has 4 divisors (see below), whose sum is σ = 21187097664. Its totient is φ = 19862904000.

The previous prime is 20525000827. The next prime is 20525000917. The reversal of 20525000831 is 13800052502.

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 20525000831 - 2² = 20525000827 is a prime.

It is a super-2 number, since 2×20525000831² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20525000831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20525000801) 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 3 ways as a sum of consecutive naturals, for example, 331048370 + ... + 331048431.

It is an arithmetic number, because the mean of its divisors is an integer number (5296774416).

Almost surely, 2^20525000831 is an apocalyptic number.

20525000831 is a deficient number, since it is larger than the sum of its proper divisors (662096833).

20525000831 is an equidigital number, since it uses as much as digits as its factorization.

20525000831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662096832.

The product of its (nonzero) digits is 2400, while the sum is 26.

The spelling of 20525000831 in words is "twenty billion, five hundred twenty-five million, eight hundred thirty-one", and thus it is an aban number.