20351530525 has 24 divisors (see below), whose sum is σ = 25840024704. Its totient is φ = 15895924800.

The previous prime is 20351530487. The next prime is 20351530543. The reversal of 20351530525 is 52503515302.

It is a de Polignac number, because none of the positive numbers 2^k-20351530525 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 127167 + ... + 238483.

It is an arithmetic number, because the mean of its divisors is an integer number (1076667696).

Almost surely, 2^20351530525 is an apocalyptic number.

20351530525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20351530525 is a deficient number, since it is larger than the sum of its proper divisors (5488494179).

20351530525 is a wasteful number, since it uses less digits than its factorization.

20351530525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111501 (or 111496 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 31.

The spelling of 20351530525 in words is "twenty billion, three hundred fifty-one million, five hundred thirty thousand, five hundred twenty-five".