23426381 has 4 divisors (see below), whose sum is σ = 25556064. Its totient is φ = 21296700.

The previous prime is 23426353. The next prime is 23426383. The reversal of 23426381 is 18362432.

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 23426381 - 2¹⁰ = 23425357 is a prime.

It is a super-2 number, since 2×23426381² = 1097590653514322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23426383) 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, 1064825 + ... + 1064846.

It is an arithmetic number, because the mean of its divisors is an integer number (6389016).

Almost surely, 2^23426381 is an apocalyptic number.

It is an amenable number.

23426381 is a deficient number, since it is larger than the sum of its proper divisors (2129683).

23426381 is a wasteful number, since it uses less digits than its factorization.

23426381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2129682.

The product of its digits is 6912, while the sum is 29.

The square root of 23426381 is about 4840.0806811457. The cubic root of 23426381 is about 286.1332980927.

The spelling of 23426381 in words is "twenty-three million, four hundred twenty-six thousand, three hundred eighty-one".