21902699874 has 24 divisors (see below), whose sum is σ = 47790332208. Its totient is φ = 6636817440.

The previous prime is 21902699867. The next prime is 21902699879. The reversal of 21902699874 is 47899620912.

It is not an unprimeable number, because it can be changed into a prime (21902699879) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1193214 + ... + 1211430.

It is an arithmetic number, because the mean of its divisors is an integer number (1991263842).

Almost surely, 2^21902699874 is an apocalyptic number.

21902699874 is an abundant number, since it is smaller than the sum of its proper divisors (25887632334).

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

21902699874 is an frugal number, since it uses more digits than its factorization.

21902699874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36450 (or 18233 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 57.

The spelling of 21902699874 in words is "twenty-one billion, nine hundred two million, six hundred ninety-nine thousand, eight hundred seventy-four".