23429813 has 4 divisors (see below), whose sum is σ = 25559808. Its totient is φ = 21299820.

The previous prime is 23429789. The next prime is 23429837. The reversal of 23429813 is 31892432.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (23429789) and next prime (23429837).

It is a cyclic number.

It is not a de Polignac number, because 23429813 - 2⁸ = 23429557 is a prime.

It is a super-2 number, since 2×23429813² = 1097912274429938, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23429813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23429113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1064981 + ... + 1065002.

It is an arithmetic number, because the mean of its divisors is an integer number (6389952).

Almost surely, 2^23429813 is an apocalyptic number.

It is an amenable number.

23429813 is a deficient number, since it is larger than the sum of its proper divisors (2129995).

23429813 is a wasteful number, since it uses less digits than its factorization.

23429813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2129994.

The product of its digits is 10368, while the sum is 32.

The square root of 23429813 is about 4840.4352077060. The cubic root of 23429813 is about 286.1472703963.

It can be divided in two parts, 23429 and 813, that added together give a palindrome (24242).

The spelling of 23429813 in words is "twenty-three million, four hundred twenty-nine thousand, eight hundred thirteen".