20525332521 has 16 divisors (see below), whose sum is σ = 29279743040. Its totient is φ = 12750851520.

The previous prime is 20525332493. The next prime is 20525332577. The reversal of 20525332521 is 12523352502.

It is not a de Polignac number, because 20525332521 - 2²³ = 20516943913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20525332621) 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, 2948110 + ... + 2955063.

It is an arithmetic number, because the mean of its divisors is an integer number (1829983940).

Almost surely, 2^20525332521 is an apocalyptic number.

It is an amenable number.

20525332521 is a deficient number, since it is larger than the sum of its proper divisors (8754410519).

20525332521 is a wasteful number, since it uses less digits than its factorization.

20525332521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5903256.

The product of its (nonzero) digits is 18000, while the sum is 30.

The spelling of 20525332521 in words is "twenty billion, five hundred twenty-five million, three hundred thirty-two thousand, five hundred twenty-one".