23740813 has 4 divisors (see below), whose sum is σ = 23794848. Its totient is φ = 23686780.

The previous prime is 23740811. The next prime is 23740819. The reversal of 23740813 is 31804732.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23740813 - 2¹ = 23740811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23740811) 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 3 ways as a sum of consecutive naturals, for example, 26353 + ... + 27238.

It is an arithmetic number, because the mean of its divisors is an integer number (5948712).

Almost surely, 2^23740813 is an apocalyptic number.

It is an amenable number.

23740813 is a deficient number, since it is larger than the sum of its proper divisors (54035).

23740813 is an equidigital number, since it uses as much as digits as its factorization.

23740813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54034.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 23740813 is about 4872.4545149237. The cubic root of 23740813 is about 287.4077859269.

The spelling of 23740813 in words is "twenty-three million, seven hundred forty thousand, eight hundred thirteen".