21692770392 has 16 divisors (see below), whose sum is σ = 54231926040. Its totient is φ = 7230923456.

The previous prime is 21692770369. The next prime is 21692770399. The reversal of 21692770392 is 29307729612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21692770399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 451932693 + ... + 451932740.

Almost surely, 2^21692770392 is an apocalyptic number.

It is an amenable number.

21692770392 is an abundant number, since it is smaller than the sum of its proper divisors (32539155648).

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

21692770392 is a wasteful number, since it uses less digits than its factorization.

21692770392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903865442 (or 903865438 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 48.

The spelling of 21692770392 in words is "twenty-one billion, six hundred ninety-two million, seven hundred seventy thousand, three hundred ninety-two".