20233031 has 24 divisors (see below), whose sum is σ = 26468064. Its totient is φ = 15301440.

The previous prime is 20233019. The next prime is 20233033. The reversal of 20233031 is 13033202.

It is a de Polignac number, because none of the positive numbers 2^k-20233031 is a prime.

It is a super-2 number, since 2×20233031² = 818751086893922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20232997 and 20233015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20233033) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13961 + ... + 15341.

It is an arithmetic number, because the mean of its divisors is an integer number (1102836).

Almost surely, 2^20233031 is an apocalyptic number.

20233031 is a deficient number, since it is larger than the sum of its proper divisors (6235033).

20233031 is a wasteful number, since it uses less digits than its factorization.

20233031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431 (or 1424 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 20233031 is about 4498.1141604010. The cubic root of 20233031 is about 272.4919325390.

Adding to 20233031 its reverse (13033202), we get a palindrome (33266233).

It can be divided in two parts, 202 and 33031, that added together give a palindrome (33233).

The spelling of 20233031 in words is "twenty million, two hundred thirty-three thousand, thirty-one".