21092692 has 6 divisors (see below), whose sum is σ = 36912218. Its totient is φ = 10546344.

The previous prime is 21092683. The next prime is 21092711. The reversal of 21092692 is 29629012.

It can be written as a sum of positive squares in only one way, i.e., 12068676 + 9024016 = 3474^2 + 3004^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2636583 + ... + 2636590.

Almost surely, 2^21092692 is an apocalyptic number.

It is an amenable number.

21092692 is a deficient number, since it is larger than the sum of its proper divisors (15819526).

21092692 is a wasteful number, since it uses less digits than its factorization.

21092692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5273177 (or 5273175 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 21092692 is about 4592.6780858231. The cubic root of 21092692 is about 276.2977428182.

The spelling of 21092692 in words is "twenty-one million, ninety-two thousand, six hundred ninety-two".