20056331 has 4 divisors (see below), whose sum is σ = 20598432. Its totient is φ = 19514232.

The previous prime is 20056321. The next prime is 20056363. The reversal of 20056331 is 13365002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20056331 is a prime.

It is a super-2 number, since 2×20056331² = 804512826363122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20056321) 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, 270995 + ... + 271068.

It is an arithmetic number, because the mean of its divisors is an integer number (5149608).

Almost surely, 2^20056331 is an apocalyptic number.

20056331 is a deficient number, since it is larger than the sum of its proper divisors (542101).

20056331 is an equidigital number, since it uses as much as digits as its factorization.

20056331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542100.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 20056331 is about 4478.4295238398. The cubic root of 20056331 is about 271.6963658717.

The spelling of 20056331 in words is "twenty million, fifty-six thousand, three hundred thirty-one".