20215502525 has 24 divisors (see below), whose sum is σ = 25613003520. Its totient is φ = 15820621760.

The previous prime is 20215502513. The next prime is 20215502533. The reversal of 20215502525 is 52520551202.

It is not a de Polignac number, because 20215502525 - 2²⁸ = 19947067069 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4318136 + ... + 4322814.

It is an arithmetic number, because the mean of its divisors is an integer number (1067208480).

Almost surely, 2^20215502525 is an apocalyptic number.

20215502525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20215502525 is a deficient number, since it is larger than the sum of its proper divisors (5397500995).

20215502525 is a wasteful number, since it uses less digits than its factorization.

20215502525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8413 (or 8408 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 29.

The spelling of 20215502525 in words is "twenty billion, two hundred fifteen million, five hundred two thousand, five hundred twenty-five".