20112131 has 8 divisors (see below), whose sum is σ = 21903840. Its totient is φ = 18355392.

The previous prime is 20112119. The next prime is 20112133. The reversal of 20112131 is 13121102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20112131 - 2¹⁸ = 19849987 is a prime.

It is a super-2 number, since 2×20112131² = 808995626722322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20112133) 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 7 ways as a sum of consecutive naturals, for example, 7535 + ... + 9848.

It is an arithmetic number, because the mean of its divisors is an integer number (2737980).

Almost surely, 2^20112131 is an apocalyptic number.

20112131 is a deficient number, since it is larger than the sum of its proper divisors (1791709).

20112131 is a wasteful number, since it uses less digits than its factorization.

20112131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17485.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 20112131 is about 4484.6550591991. The cubic root of 20112131 is about 271.9481005001.

Adding to 20112131 its reverse (13121102), we get a palindrome (33233233).

The spelling of 20112131 in words is "twenty million, one hundred twelve thousand, one hundred thirty-one".