20524531321 has 16 divisors (see below), whose sum is σ = 24515371008. Its totient is φ = 16800814800.

The previous prime is 20524531301. The next prime is 20524531333. The reversal of 20524531321 is 12313542502.

It is not a de Polignac number, because 20524531321 - 2⁷ = 20524531193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20524531321.

It is not an unprimeable number, because it can be changed into a prime (20524531301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 576 + ... + 202606.

It is an arithmetic number, because the mean of its divisors is an integer number (1532210688).

Almost surely, 2^20524531321 is an apocalyptic number.

It is an amenable number.

20524531321 is a deficient number, since it is larger than the sum of its proper divisors (3990839687).

20524531321 is a wasteful number, since it uses less digits than its factorization.

20524531321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202692.

The product of its (nonzero) digits is 7200, while the sum is 28.

The spelling of 20524531321 in words is "twenty billion, five hundred twenty-four million, five hundred thirty-one thousand, three hundred twenty-one".