20056775 has 12 divisors (see below), whose sum is σ = 25543752. Its totient is φ = 15611040.

The previous prime is 20056769. The next prime is 20056781. The reversal of 20056775 is 57765002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20056769) and next prime (20056781).

It is not a de Polignac number, because 20056775 - 2¹⁰ = 20055751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9917 + ... + 11766.

It is an arithmetic number, because the mean of its divisors is an integer number (2128646).

Almost surely, 2^20056775 is an apocalyptic number.

20056775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20056775 is a deficient number, since it is larger than the sum of its proper divisors (5486977).

20056775 is a wasteful number, since it uses less digits than its factorization.

20056775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21730 (or 21725 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 32.

The square root of 20056775 is about 4478.4790945141. The cubic root of 20056775 is about 271.6983707631.

The spelling of 20056775 in words is "twenty million, fifty-six thousand, seven hundred seventy-five".