20737472556 has 24 divisors (see below), whose sum is σ = 50934143680. Its totient is φ = 6548675472.

The previous prime is 20737472549. The next prime is 20737472563. The reversal of 20737472556 is 65527473702.

It is an interprime number because it is at equal distance from previous prime (20737472549) and next prime (20737472563).

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, 45476686 + ... + 45477141.

Almost surely, 2^20737472556 is an apocalyptic number.

It is an amenable number.

20737472556 is an abundant number, since it is smaller than the sum of its proper divisors (30196671124).

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

20737472556 is a wasteful number, since it uses less digits than its factorization.

20737472556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90953853 (or 90953851 counting only the distinct ones).

The product of its (nonzero) digits is 2469600, while the sum is 48.

The spelling of 20737472556 in words is "twenty billion, seven hundred thirty-seven million, four hundred seventy-two thousand, five hundred fifty-six".