20551652464 has 40 divisors (see below), whose sum is σ = 45536122208. Its totient is φ = 8802259200.

The previous prime is 20551652453. The next prime is 20551652483. The reversal of 20551652464 is 46425615502.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121414 + ... + 236314.

Almost surely, 2^20551652464 is an apocalyptic number.

It is an amenable number.

20551652464 is an abundant number, since it is smaller than the sum of its proper divisors (24984469744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20551652464 is a wasteful number, since it uses less digits than its factorization.

20551652464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116513 (or 116507 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 40.

The spelling of 20551652464 in words is "twenty billion, five hundred fifty-one million, six hundred fifty-two thousand, four hundred sixty-four".