20183790685 has 32 divisors (see below), whose sum is σ = 26485678080. Its totient is φ = 14706481152.

The previous prime is 20183790661. The next prime is 20183790689. The reversal of 20183790685 is 58609738102.

It is a cyclic number.

It is not a de Polignac number, because 20183790685 - 2²⁷ = 20049572957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20183790689) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 327172 + ... + 383938.

It is an arithmetic number, because the mean of its divisors is an integer number (827677440).

Almost surely, 2^20183790685 is an apocalyptic number.

It is an amenable number.

20183790685 is a deficient number, since it is larger than the sum of its proper divisors (6301887395).

20183790685 is a wasteful number, since it uses less digits than its factorization.

20183790685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56925.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 20183790685 in words is "twenty billion, one hundred eighty-three million, seven hundred ninety thousand, six hundred eighty-five".