20472063540 has 48 divisors (see below), whose sum is σ = 58541398272. Its totient is φ = 5343062656.

The previous prime is 20472063511. The next prime is 20472063553. The reversal of 20472063540 is 4536027402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3626979 + ... + 3632618.

It is an arithmetic number, because the mean of its divisors is an integer number (1219612464).

Almost surely, 2^20472063540 is an apocalyptic number.

20472063540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20472063540 is an abundant number, since it is smaller than the sum of its proper divisors (38069334732).

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

20472063540 is a wasteful number, since it uses less digits than its factorization.

20472063540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7259656 (or 7259654 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 33.

The spelling of 20472063540 in words is "twenty billion, four hundred seventy-two million, sixty-three thousand, five hundred forty".