20185708 has 12 divisors (see below), whose sum is σ = 35396200. Its totient is φ = 10072512.

The previous prime is 20185691. The next prime is 20185709. The reversal of 20185708 is 80758102.

It is a super-2 number, since 2×20185708² = 814925614922528, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20185708.

It is not an unprimeable number, because it can be changed into a prime (20185709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2733 + ... + 6916.

Almost surely, 2^20185708 is an apocalyptic number.

It is an amenable number.

20185708 is a deficient number, since it is larger than the sum of its proper divisors (15210492).

20185708 is a wasteful number, since it uses less digits than its factorization.

20185708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10176 (or 10174 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 20185708 is about 4492.8507653827. The cubic root of 20185708 is about 272.2793230643.

The spelling of 20185708 in words is "twenty million, one hundred eighty-five thousand, seven hundred eight".