20131907 has 2 divisors, whose sum is σ = 20131908. Its totient is φ = 20131906.

The previous prime is 20131883. The next prime is 20131919. The reversal of 20131907 is 70913102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20131907 - 2¹⁴ = 20115523 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20131987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10065953 + 10065954.

It is an arithmetic number, because the mean of its divisors is an integer number (10065954).

Almost surely, 2^20131907 is an apocalyptic number.

20131907 is a deficient number, since it is larger than the sum of its proper divisors (1).

20131907 is an equidigital number, since it uses as much as digits as its factorization.

20131907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 20131907 is about 4486.8593693139. The cubic root of 20131907 is about 272.0372056588.

The spelling of 20131907 in words is "twenty million, one hundred thirty-one thousand, nine hundred seven".