20528456480 has 48 divisors (see below), whose sum is σ = 55426835520. Its totient is φ = 7038327552.

The previous prime is 20528456477. The next prime is 20528456489. The reversal of 20528456480 is 8465482502.

It is not an unprimeable number, because it can be changed into a prime (20528456489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9163370 + ... + 9165609.

It is an arithmetic number, because the mean of its divisors is an integer number (1154725740).

Almost surely, 2^20528456480 is an apocalyptic number.

20528456480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20528456480 is an abundant number, since it is smaller than the sum of its proper divisors (34898379040).

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

20528456480 is a wasteful number, since it uses less digits than its factorization.

20528456480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18329001 (or 18328993 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 44.

The spelling of 20528456480 in words is "twenty billion, five hundred twenty-eight million, four hundred fifty-six thousand, four hundred eighty".