20880400104 has 64 divisors (see below), whose sum is σ = 59235206400. Its totient is φ = 6812042112.

The previous prime is 20880400081. The next prime is 20880400111. The reversal of 20880400104 is 40100408802.

It is a super-2 number, since 2×20880400104² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 1018237 + ... + 1038540.

It is an arithmetic number, because the mean of its divisors is an integer number (925550100).

Almost surely, 2^20880400104 is an apocalyptic number.

20880400104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20880400104 is an abundant number, since it is smaller than the sum of its proper divisors (38354806296).

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

20880400104 is a wasteful number, since it uses less digits than its factorization.

20880400104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2056839 (or 2056829 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

Adding to 20880400104 its reverse (40100408802), we get a palindrome (60980808906).

The spelling of 20880400104 in words is "twenty billion, eight hundred eighty million, four hundred thousand, one hundred four".