21707233492 has 12 divisors (see below), whose sum is σ = 43414467040. Its totient is φ = 9303100056.

The previous prime is 21707233489. The next prime is 21707233511. The reversal of 21707233492 is 29433270712.

It is a happy number.

21707233492 is an admirable number.

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, 387629142 + ... + 387629197.

Almost surely, 2^21707233492 is an apocalyptic number.

It is an amenable number.

21707233492 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.

21707233492 is a wasteful number, since it uses less digits than its factorization.

21707233492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775258350 (or 775258348 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 40.

The spelling of 21707233492 in words is "twenty-one billion, seven hundred seven million, two hundred thirty-three thousand, four hundred ninety-two".