21835486464 has 72 divisors (see below), whose sum is σ = 63397374432. Its totient is φ = 6616811520.

The previous prime is 21835486459. The next prime is 21835486499. The reversal of 21835486464 is 46468453812.

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, 1283899 + ... + 1300794.

Almost surely, 2^21835486464 is an apocalyptic number.

21835486464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21835486464 is an abundant number, since it is smaller than the sum of its proper divisors (41561887968).

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

21835486464 is a wasteful number, since it uses less digits than its factorization.

21835486464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2584723 (or 2584709 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 51.

The spelling of 21835486464 in words is "twenty-one billion, eight hundred thirty-five million, four hundred eighty-six thousand, four hundred sixty-four".