20124131 has 4 divisors (see below), whose sum is σ = 20552352. Its totient is φ = 19695912.

The previous prime is 20124127. The next prime is 20124179. The reversal of 20124131 is 13142102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13142102 = 2 ⋅6571051.

It is a cyclic number.

It is not a de Polignac number, because 20124131 - 2² = 20124127 is a prime.

It is a super-2 number, since 2×20124131² = 809961297010322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20124101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214040 + ... + 214133.

It is an arithmetic number, because the mean of its divisors is an integer number (5138088).

Almost surely, 2^20124131 is an apocalyptic number.

20124131 is a deficient number, since it is larger than the sum of its proper divisors (428221).

20124131 is an equidigital number, since it uses as much as digits as its factorization.

20124131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428220.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 20124131 is about 4485.9927552327. The cubic root of 20124131 is about 272.0021761288.

Adding to 20124131 its reverse (13142102), we get a palindrome (33266233).

The spelling of 20124131 in words is "twenty million, one hundred twenty-four thousand, one hundred thirty-one".