21282707904 has 28 divisors (see below), whose sum is σ = 56310498504. Its totient is φ = 7094235904.

The previous prime is 21282707869. The next prime is 21282707923. The reversal of 21282707904 is 40970728212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55423527 + ... + 55423910.

Almost surely, 2^21282707904 is an apocalyptic number.

21282707904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21282707904 is an abundant number, since it is smaller than the sum of its proper divisors (35027790600).

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

21282707904 is a wasteful number, since it uses less digits than its factorization.

21282707904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110847452 (or 110847442 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 42.

The spelling of 21282707904 in words is "twenty-one billion, two hundred eighty-two million, seven hundred seven thousand, nine hundred four".