21459974496 has 96 divisors (see below), whose sum is σ = 56709072000. Its totient is φ = 7105674240.

The previous prime is 21459974489. The next prime is 21459974519. The reversal of 21459974496 is 69447995412.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10222855 + ... + 10224953.

It is an arithmetic number, because the mean of its divisors is an integer number (590719500).

Almost surely, 2^21459974496 is an apocalyptic number.

It is an amenable number.

21459974496 is an abundant number, since it is smaller than the sum of its proper divisors (35249097504).

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

21459974496 is a wasteful number, since it uses less digits than its factorization.

21459974496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2772 (or 2764 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 60.

The spelling of 21459974496 in words is "twenty-one billion, four hundred fifty-nine million, nine hundred seventy-four thousand, four hundred ninety-six".