21894406092 has 36 divisors (see below), whose sum is σ = 59601440080. Its totient is φ = 6736740192.

The previous prime is 21894406087. The next prime is 21894406129. The reversal of 21894406092 is 29060449812.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23390992 + ... + 23391927.

Almost surely, 2^21894406092 is an apocalyptic number.

It is an amenable number.

21894406092 is an abundant number, since it is smaller than the sum of its proper divisors (37707033988).

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

21894406092 is a wasteful number, since it uses less digits than its factorization.

21894406092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46782942 (or 46782937 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 21894406092 in words is "twenty-one billion, eight hundred ninety-four million, four hundred six thousand, ninety-two".