20215524628 has 18 divisors (see below), whose sum is σ = 38100421086. Its totient is φ = 9329768928.

The previous prime is 20215524583. The next prime is 20215524673. The reversal of 20215524628 is 82642551202.

It is an interprime number because it is at equal distance from previous prime (20215524583) and next prime (20215524673).

It can be written as a sum of positive squares in 3 ways, for example, as 2191925124 + 18023599504 = 46818^2 + 134252^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1015426 + ... + 1035142.

Almost surely, 2^20215524628 is an apocalyptic number.

It is an amenable number.

20215524628 is a deficient number, since it is larger than the sum of its proper divisors (17884896458).

20215524628 is an frugal number, since it uses more digits than its factorization.

20215524628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39451 (or 19732 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 37.

The spelling of 20215524628 in words is "twenty billion, two hundred fifteen million, five hundred twenty-four thousand, six hundred twenty-eight".