20057131 has 2 divisors, whose sum is σ = 20057132. Its totient is φ = 20057130.

The previous prime is 20057123. The next prime is 20057137. The reversal of 20057131 is 13175002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20057131 - 2³ = 20057123 is a prime.

It is a super-2 number, since 2×20057131² = 804577007902322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20057099 and 20057108.

It is not a weakly prime, because it can be changed into another prime (20057137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10028565 + 10028566.

It is an arithmetic number, because the mean of its divisors is an integer number (10028566).

Almost surely, 2^20057131 is an apocalyptic number.

20057131 is a deficient number, since it is larger than the sum of its proper divisors (1).

20057131 is an equidigital number, since it uses as much as digits as its factorization.

20057131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 20057131 is about 4478.5188399738. The cubic root of 20057131 is about 271.6999782672.

The spelling of 20057131 in words is "twenty million, fifty-seven thousand, one hundred thirty-one".