21025548096 has 56 divisors (see below), whose sum is σ = 63577256640. Its totient is φ = 6007299072.

The previous prime is 21025548079. The next prime is 21025548107. The reversal of 21025548096 is 69084552012.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

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, 7820661 + ... + 7823348.

Almost surely, 2^21025548096 is an apocalyptic number.

It is an amenable number.

21025548096 is an abundant number, since it is smaller than the sum of its proper divisors (42551708544).

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

21025548096 is a wasteful number, since it uses less digits than its factorization.

21025548096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15644031 (or 15644021 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The spelling of 21025548096 in words is "twenty-one billion, twenty-five million, five hundred forty-eight thousand, ninety-six".