21759918954 has 32 divisors (see below), whose sum is σ = 43858264320. Its totient is φ = 7197120000.

The previous prime is 21759918941. The next prime is 21759918991. The reversal of 21759918954 is 45981995712.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 375954 + ... + 429954.

It is an arithmetic number, because the mean of its divisors is an integer number (1370570760).

Almost surely, 2^21759918954 is an apocalyptic number.

21759918954 is an abundant number, since it is smaller than the sum of its proper divisors (22098345366).

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

21759918954 is a wasteful number, since it uses less digits than its factorization.

21759918954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54526.

The product of its digits is 8164800, while the sum is 60.

The spelling of 21759918954 in words is "twenty-one billion, seven hundred fifty-nine million, nine hundred eighteen thousand, nine hundred fifty-four".