20192913 has 12 divisors (see below), whose sum is σ = 31411380. Its totient is φ = 12426336.

The previous prime is 20192857. The next prime is 20192917. The reversal of 20192913 is 31929102.

It can be written as a sum of positive squares in 2 ways, for example, as 10810944 + 9381969 = 3288^2 + 3063^2 .

It is not a de Polignac number, because 20192913 - 2⁶ = 20192849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20192917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86178 + ... + 86411.

It is an arithmetic number, because the mean of its divisors is an integer number (2617615).

Almost surely, 2^20192913 is an apocalyptic number.

It is an amenable number.

20192913 is a deficient number, since it is larger than the sum of its proper divisors (11218467).

20192913 is a wasteful number, since it uses less digits than its factorization.

20192913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172608 (or 172605 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 20192913 is about 4493.6525232821. The cubic root of 20192913 is about 272.3117146151.

The spelling of 20192913 in words is "twenty million, one hundred ninety-two thousand, nine hundred thirteen".