20662515356 has 24 divisors (see below), whose sum is σ = 41409223296. Its totient is φ = 8837322480.

The previous prime is 20662515239. The next prime is 20662515361. The reversal of 20662515356 is 65351526602.

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, 737726 + ... + 765221.

It is an arithmetic number, because the mean of its divisors is an integer number (1725384304).

Almost surely, 2^20662515356 is an apocalyptic number.

It is an amenable number.

20662515356 is an abundant number, since it is smaller than the sum of its proper divisors (20746707940).

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

20662515356 is a wasteful number, since it uses less digits than its factorization.

20662515356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1503449 (or 1503447 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 41.

The spelling of 20662515356 in words is "twenty billion, six hundred sixty-two million, five hundred fifteen thousand, three hundred fifty-six".