21797092 has 12 divisors (see below), whose sum is σ = 39375616. Its totient is φ = 10546920.

The previous prime is 21797063. The next prime is 21797093. The reversal of 21797092 is 29079712.

It is a super-2 number, since 2×21797092² = 950226439312928, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (21797093) 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, 87768 + ... + 88015.

Almost surely, 2^21797092 is an apocalyptic number.

It is an amenable number.

21797092 is a deficient number, since it is larger than the sum of its proper divisors (17578524).

21797092 is a wasteful number, since it uses less digits than its factorization.

21797092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175818 (or 175816 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 21797092 is about 4668.7355890005. The cubic root of 21797092 is about 279.3398222219.

The spelling of 21797092 in words is "twenty-one million, seven hundred ninety-seven thousand, ninety-two".