21254975104 has 64 divisors (see below), whose sum is σ = 47786306400. Its totient is φ = 9328184320.

The previous prime is 21254975083. The next prime is 21254975113. The reversal of 21254975104 is 40157945212.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-3 number, since 3×21254975104³ (a number of 32 digits) contains 333 as substring.

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, 219442 + ... + 301105.

Almost surely, 2^21254975104 is an apocalyptic number.

It is an amenable number.

21254975104 is an abundant number, since it is smaller than the sum of its proper divisors (26531331296).

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

21254975104 is a wasteful number, since it uses less digits than its factorization.

21254975104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520601 (or 520589 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 21254975104 in words is "twenty-one billion, two hundred fifty-four million, nine hundred seventy-five thousand, one hundred four".