20233131 has 16 divisors (see below), whose sum is σ = 27783168. Its totient is φ = 13089600.

The previous prime is 20233127. The next prime is 20233141. The reversal of 20233131 is 13133202.

It is not a de Polignac number, because 20233131 - 2² = 20233127 is a prime.

It is a super-2 number, since 2×20233131² = 818759180126322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20233131.

It is not an unprimeable number, because it can be changed into a prime (20233141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33030 + ... + 33636.

It is an arithmetic number, because the mean of its divisors is an integer number (1736448).

Almost surely, 2^20233131 is an apocalyptic number.

20233131 is a deficient number, since it is larger than the sum of its proper divisors (7550037).

20233131 is a wasteful number, since it uses less digits than its factorization.

20233131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 20233131 is about 4498.1252761567. The cubic root of 20233131 is about 272.4923814608.

Adding to 20233131 its reverse (13133202), we get a palindrome (33366333).

It can be divided in two parts, 202 and 33131, that added together give a palindrome (33333).

The spelling of 20233131 in words is "twenty million, two hundred thirty-three thousand, one hundred thirty-one".