20365331 has 12 divisors (see below), whose sum is σ = 23994720. Its totient is φ = 17231760.

The previous prime is 20365313. The next prime is 20365333. The reversal of 20365331 is 13356302.

It is not a de Polignac number, because 20365331 - 2²² = 16171027 is a prime.

It is a super-2 number, since 2×20365331² = 829493413479122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20365297 and 20365306.

It is not an unprimeable number, because it can be changed into a prime (20365333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1241 + ... + 6501.

It is an arithmetic number, because the mean of its divisors is an integer number (1999560).

Almost surely, 2^20365331 is an apocalyptic number.

20365331 is a deficient number, since it is larger than the sum of its proper divisors (3629389).

20365331 is an equidigital number, since it uses as much as digits as its factorization.

20365331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5354 (or 5347 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 23.

The square root of 20365331 is about 4512.7963614593. The cubic root of 20365331 is about 273.0845672701.

The spelling of 20365331 in words is "twenty million, three hundred sixty-five thousand, three hundred thirty-one".