21887252880 has 40 divisors (see below), whose sum is σ = 67850484672. Its totient is φ = 5836600704.

The previous prime is 21887252843. The next prime is 21887252887. The reversal of 21887252880 is 8825278812.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (21887252887) 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, 45598204 + ... + 45598683.

Almost surely, 2^21887252880 is an apocalyptic number.

21887252880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21887252880 is an abundant number, since it is smaller than the sum of its proper divisors (45963231792).

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

21887252880 is a wasteful number, since it uses less digits than its factorization.

21887252880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91196903 (or 91196897 counting only the distinct ones).

The product of its (nonzero) digits is 1146880, while the sum is 51.

The spelling of 21887252880 in words is "twenty-one billion, eight hundred eighty-seven million, two hundred fifty-two thousand, eight hundred eighty".