20531022525 has 36 divisors (see below), whose sum is σ = 39602066868. Its totient is φ = 10107578880.

The previous prime is 20531022521. The next prime is 20531022529. The reversal of 20531022525 is 52522013502.

It is an interprime number because it is at equal distance from previous prime (20531022521) and next prime (20531022529).

It can be written as a sum of positive squares in 6 ways, for example, as 3583449 + 20527439076 = 1893^2 + 143274^2 .

It is not a de Polignac number, because 20531022525 - 2² = 20531022521 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20531022521) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3506652 + ... + 3512501.

It is an arithmetic number, because the mean of its divisors is an integer number (1100057413).

Almost surely, 2^20531022525 is an apocalyptic number.

20531022525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20531022525 is a deficient number, since it is larger than the sum of its proper divisors (19071044343).

20531022525 is a wasteful number, since it uses less digits than its factorization.

20531022525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7019182 (or 7019174 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The spelling of 20531022525 in words is "twenty billion, five hundred thirty-one million, twenty-two thousand, five hundred twenty-five".