26221964100 has 72 divisors (see below), whose sum is σ = 77719379808. Its totient is φ = 6821971200.

The previous prime is 26221964089. The next prime is 26221964147. The reversal of 26221964100 is 146912262.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1053634 + ... + 1078233.

Almost surely, 2^26221964100 is an apocalyptic number.

26221964100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26221964100 is an abundant number, since it is smaller than the sum of its proper divisors (51497415708).

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

26221964100 is a wasteful number, since it uses less digits than its factorization.

26221964100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131925 (or 2131918 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The spelling of 26221964100 in words is "twenty-six billion, two hundred twenty-one million, nine hundred sixty-four thousand, one hundred".