20392013 has 2 divisors, whose sum is σ = 20392014. Its totient is φ = 20392012.

The previous prime is 20391979. The next prime is 20392037. The reversal of 20392013 is 31029302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17952169 + 2439844 = 4237^2 + 1562^2 .

It is a cyclic number.

It is not a de Polignac number, because 20392013 - 2¹⁸ = 20129869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20392063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10196006 + 10196007.

It is an arithmetic number, because the mean of its divisors is an integer number (10196007).

Almost surely, 2^20392013 is an apocalyptic number.

It is an amenable number.

20392013 is a deficient number, since it is larger than the sum of its proper divisors (1).

20392013 is an equidigital number, since it uses as much as digits as its factorization.

20392013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 20392013 is about 4515.7516539332. The cubic root of 20392013 is about 273.2037774216.

The spelling of 20392013 in words is "twenty million, three hundred ninety-two thousand, thirteen".