20000131 has 4 divisors (see below), whose sum is σ = 20328064. Its totient is φ = 19672200.

The previous prime is 20000107. The next prime is 20000147. The reversal of 20000131 is 13100002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13100002 = 2 ⋅6550001.

It is a cyclic number.

It is not a de Polignac number, because 20000131 - 2⁷ = 20000003 is a prime.

It is a super-2 number, since 2×20000131² = 800010480034322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20000161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163875 + ... + 163996.

It is an arithmetic number, because the mean of its divisors is an integer number (5082016).

Almost surely, 2^20000131 is an apocalyptic number.

20000131 is a deficient number, since it is larger than the sum of its proper divisors (327933).

20000131 is an equidigital number, since it uses as much as digits as its factorization.

20000131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327932.

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 20000131 is about 4472.1506012208. The cubic root of 20000131 is about 271.4423543060.

Adding to 20000131 its reverse (13100002), we get a palindrome (33100133).

The spelling of 20000131 in words is "twenty million, one hundred thirty-one", and thus it is an aban number.