20124231 has 16 divisors (see below), whose sum is σ = 27907200. Its totient is φ = 12883808.

The previous prime is 20124229. The next prime is 20124233. The reversal of 20124231 is 13242102.

It is an interprime number because it is at equal distance from previous prime (20124229) and next prime (20124233).

It is a cyclic number.

It is not a de Polignac number, because 20124231 - 2¹ = 20124229 is a prime.

It is a super-2 number, since 2×20124231² = 809969346682722, 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 20124231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20124233) 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 15 ways as a sum of consecutive naturals, for example, 19240 + ... + 20258.

It is an arithmetic number, because the mean of its divisors is an integer number (1744200).

Almost surely, 2^20124231 is an apocalyptic number.

20124231 is a deficient number, since it is larger than the sum of its proper divisors (7782969).

20124231 is a wasteful number, since it uses less digits than its factorization.

20124231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 20124231 is about 4486.0039010237. The cubic root of 20124231 is about 272.0026266687.

Adding to 20124231 its reverse (13242102), we get a palindrome (33366333).

It can be divided in two parts, 20 and 124231, that added together give a triangular number (124251 = T₄₉₈).

The spelling of 20124231 in words is "twenty million, one hundred twenty-four thousand, two hundred thirty-one".