21954744080 has 40 divisors (see below), whose sum is σ = 51113990400. Its totient is φ = 8769990528.

The previous prime is 21954744073. The next prime is 21954744103. The reversal of 21954744080 is 8044745912.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126560 + ... + 244799.

It is an arithmetic number, because the mean of its divisors is an integer number (1277849760).

Almost surely, 2^21954744080 is an apocalyptic number.

21954744080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21954744080 is an abundant number, since it is smaller than the sum of its proper divisors (29159246320).

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

21954744080 is a wasteful number, since it uses less digits than its factorization.

21954744080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372111 (or 372105 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 44.

The spelling of 21954744080 in words is "twenty-one billion, nine hundred fifty-four million, seven hundred forty-four thousand, eighty".