21761692 has 12 divisors (see below), whose sum is σ = 38146696. Its totient is φ = 10862640.

The previous prime is 21761681. The next prime is 21761699. The reversal of 21761692 is 29616712.

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 not an unprimeable number, because it can be changed into a prime (21761699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1659 + ... + 6802.

Almost surely, 2^21761692 is an apocalyptic number.

It is an amenable number.

21761692 is a deficient number, since it is larger than the sum of its proper divisors (16385004).

21761692 is a wasteful number, since it uses less digits than its factorization.

21761692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9108 (or 9106 counting only the distinct ones).

The product of its digits is 9072, while the sum is 34.

The square root of 21761692 is about 4664.9428721047. The cubic root of 21761692 is about 279.1885178213.

The spelling of 21761692 in words is "twenty-one million, seven hundred sixty-one thousand, six hundred ninety-two".