20056785 has 32 divisors (see below), whose sum is σ = 37235712. Its totient is φ = 9028800.

The previous prime is 20056781. The next prime is 20056789. The reversal of 20056785 is 58765002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20056781) and next prime (20056789).

It is not a de Polignac number, because 20056785 - 2² = 20056781 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20056781) 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, 5610 + ... + 8460.

It is an arithmetic number, because the mean of its divisors is an integer number (1163616).

Almost surely, 2^20056785 is an apocalyptic number.

It is an amenable number.

20056785 is a deficient number, since it is larger than the sum of its proper divisors (17178927).

20056785 is a wasteful number, since it uses less digits than its factorization.

20056785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2933.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 20056785 is about 4478.4802109644. The cubic root of 20056785 is about 271.6984159179.

The spelling of 20056785 in words is "twenty million, fifty-six thousand, seven hundred eighty-five".