20545912488 has 32 divisors (see below), whose sum is σ = 52068412800. Its totient is φ = 6754819968.

The previous prime is 20545912487. The next prime is 20545912493. The reversal of 20545912488 is 88421954502.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (20545912487) 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, 5861808 + ... + 5865311.

It is an arithmetic number, because the mean of its divisors is an integer number (1627137900).

Almost surely, 2^20545912488 is an apocalyptic number.

It is an amenable number.

20545912488 is an abundant number, since it is smaller than the sum of its proper divisors (31522500312).

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

20545912488 is a wasteful number, since it uses less digits than its factorization.

20545912488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11727201 (or 11727197 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 48.

The spelling of 20545912488 in words is "twenty billion, five hundred forty-five million, nine hundred twelve thousand, four hundred eighty-eight".