21034025908 has 12 divisors (see below), whose sum is σ = 42068051872. Its totient is φ = 9014582520.

The previous prime is 21034025879. The next prime is 21034025921. The reversal of 21034025908 is 80952043012.

21034025908 is an admirable number.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 375607578 + ... + 375607633.

Almost surely, 2^21034025908 is an apocalyptic number.

21034025908 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21034025908 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21034025908 is a wasteful number, since it uses less digits than its factorization.

21034025908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751215222 (or 751215220 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The spelling of 21034025908 in words is "twenty-one billion, thirty-four million, twenty-five thousand, nine hundred eight".