21554080892 has 12 divisors (see below), whose sum is σ = 38936404416. Its totient is φ = 10429393920.

The previous prime is 21554080879. The next prime is 21554080907. The reversal of 21554080892 is 29808045512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86911493 + ... + 86911740.

It is an arithmetic number, because the mean of its divisors is an integer number (3244700368).

Almost surely, 2^21554080892 is an apocalyptic number.

It is an amenable number.

21554080892 is a deficient number, since it is larger than the sum of its proper divisors (17382323524).

21554080892 is a wasteful number, since it uses less digits than its factorization.

21554080892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173823268 (or 173823266 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 44.

The spelling of 21554080892 in words is "twenty-one billion, five hundred fifty-four million, eighty thousand, eight hundred ninety-two".