20888474880 has 864 divisors, whose sum is σ = 86592473856. Its totient is φ = 4178313216.

The previous prime is 20888474861. The next prime is 20888474897. The reversal of 20888474880 is 8847488802.

It is a self number, because there is not a number n which added to its sum of digits gives 20888474880.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 184853704 + ... + 184853816.

Almost surely, 2^20888474880 is an apocalyptic number.

20888474880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20888474880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43296236928).

20888474880 is an abundant number, since it is smaller than the sum of its proper divisors (65703998976).

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

20888474880 is a wasteful number, since it uses less digits than its factorization.

20888474880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 7340032, while the sum is 57.

The spelling of 20888474880 in words is "twenty billion, eight hundred eighty-eight million, four hundred seventy-four thousand, eight hundred eighty".