20023031 has 16 divisors (see below), whose sum is σ = 23774016. Its totient is φ = 16505856.

The previous prime is 20023027. The next prime is 20023037. The reversal of 20023031 is 13032002.

It is a cyclic number.

It is not a de Polignac number, because 20023031 - 2² = 20023027 is a prime.

It is a super-2 number, since 2×20023031² = 801843540853922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023037) 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, 24725 + ... + 25521.

It is an arithmetic number, because the mean of its divisors is an integer number (1485876).

Almost surely, 2^20023031 is an apocalyptic number.

20023031 is a deficient number, since it is larger than the sum of its proper divisors (3750985).

20023031 is an equidigital number, since it uses as much as digits as its factorization.

20023031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938.

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 20023031 is about 4474.7101582114. The cubic root of 20023031 is about 271.5459146108.

Adding to 20023031 its reverse (13032002), we get a palindrome (33055033).

The spelling of 20023031 in words is "twenty million, twenty-three thousand, thirty-one".