23281813 has 8 divisors (see below), whose sum is σ = 23916960. Its totient is φ = 22654800.

The previous prime is 23281807. The next prime is 23281829. The reversal of 23281813 is 31818232.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23281813 - 2⁵ = 23281781 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 (23281613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4006 + ... + 7912.

It is an arithmetic number, because the mean of its divisors is an integer number (2989620).

Almost surely, 2^23281813 is an apocalyptic number.

It is an amenable number.

23281813 is a deficient number, since it is larger than the sum of its proper divisors (635147).

23281813 is a wasteful number, since it uses less digits than its factorization.

23281813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4067.

The product of its digits is 2304, while the sum is 28.

The square root of 23281813 is about 4825.1231072378. The cubic root of 23281813 is about 285.5434914825.

The spelling of 23281813 in words is "twenty-three million, two hundred eighty-one thousand, eight hundred thirteen".