20157413 has 2 divisors, whose sum is σ = 20157414. Its totient is φ = 20157412.

The previous prime is 20157391. The next prime is 20157421. The reversal of 20157413 is 31475102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18258529 + 1898884 = 4273^2 + 1378^2 .

It is a cyclic number.

It is not a de Polignac number, because 20157413 - 2²⁴ = 3380197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20157433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10078706 + 10078707.

It is an arithmetic number, because the mean of its divisors is an integer number (10078707).

Almost surely, 2^20157413 is an apocalyptic number.

It is an amenable number.

20157413 is a deficient number, since it is larger than the sum of its proper divisors (1).

20157413 is an equidigital number, since it uses as much as digits as its factorization.

20157413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 20157413 is about 4489.7007695391. The cubic root of 20157413 is about 272.1520424825.

The spelling of 20157413 in words is "twenty million, one hundred fifty-seven thousand, four hundred thirteen".