20664292 has 24 divisors (see below), whose sum is σ = 39618432. Its totient is φ = 9352800.

The previous prime is 20664289. The next prime is 20664313. The reversal of 20664292 is 29246602.

It is a super-2 number, since 2×20664292² = 854025927722528, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11058 + ... + 12790.

It is an arithmetic number, because the mean of its divisors is an integer number (1650768).

Almost surely, 2^20664292 is an apocalyptic number.

20664292 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20664292 is a deficient number, since it is larger than the sum of its proper divisors (18954140).

20664292 is a wasteful number, since it uses less digits than its factorization.

20664292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2019 (or 2017 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 20664292 is about 4545.7993796471. The cubic root of 20664292 is about 274.4143658525.

The spelling of 20664292 in words is "twenty million, six hundred sixty-four thousand, two hundred ninety-two".