20683692 has 18 divisors (see below), whose sum is σ = 52283868. Its totient is φ = 6894552.

The previous prime is 20683681. The next prime is 20683709. The reversal of 20683692 is 29638602.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×20683692² = 855630229501728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 574547 = 20683692 / (2 + 0 + 6 + 8 + 3 + 6 + 9 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 287238 + ... + 287309.

Almost surely, 2^20683692 is an apocalyptic number.

It is an amenable number.

20683692 is an abundant number, since it is smaller than the sum of its proper divisors (31600176).

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

20683692 is a wasteful number, since it uses less digits than its factorization.

20683692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574557 (or 574552 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 20683692 is about 4547.9327171804. The cubic root of 20683692 is about 274.5002140005.

The spelling of 20683692 in words is "twenty million, six hundred eighty-three thousand, six hundred ninety-two".