20431292525 has 24 divisors (see below), whose sum is σ = 29240759424. Its totient is φ = 13871304000.

The previous prime is 20431292507. The next prime is 20431292527. The reversal of 20431292525 is 52529213402.

It is not a de Polignac number, because 20431292525 - 2¹⁰ = 20431291501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431292527) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 560297 + ... + 595646.

It is an arithmetic number, because the mean of its divisors is an integer number (1218364976).

Almost surely, 2^20431292525 is an apocalyptic number.

20431292525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20431292525 is a deficient number, since it is larger than the sum of its proper divisors (8809466899).

20431292525 is a wasteful number, since it uses less digits than its factorization.

20431292525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156061 (or 1156056 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 20431292525 in words is "twenty billion, four hundred thirty-one million, two hundred ninety-two thousand, five hundred twenty-five".