20232913 has 4 divisors (see below), whose sum is σ = 20257380. Its totient is φ = 20208448.

The previous prime is 20232887. The next prime is 20232917. The reversal of 20232913 is 31923202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11370384 + 8862529 = 3372^2 + 2977^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20232913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20232917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10948 + ... + 12661.

It is an arithmetic number, because the mean of its divisors is an integer number (5064345).

Almost surely, 2^20232913 is an apocalyptic number.

It is an amenable number.

20232913 is a deficient number, since it is larger than the sum of its proper divisors (24467).

20232913 is an equidigital number, since it uses as much as digits as its factorization.

20232913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24466.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 20232913 is about 4498.1010437739. The cubic root of 20232913 is about 272.4914028093.

The spelling of 20232913 in words is "twenty million, two hundred thirty-two thousand, nine hundred thirteen".