22623381 has 20 divisors (see below), whose sum is σ = 36869184. Its totient is φ = 13710600.

The previous prime is 22623361. The next prime is 22623389. The reversal of 22623381 is 18332622.

22623381 is a `hidden beast` number, since 2 + 2 + 623 + 38 + 1 = 666.

It is not a de Polignac number, because 22623381 - 2¹⁵ = 22590613 is a prime.

It is a super-2 number, since 2×22623381² = 1023634735742322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22623389) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11805 + ... + 13586.

Almost surely, 2^22623381 is an apocalyptic number.

It is an amenable number.

22623381 is a deficient number, since it is larger than the sum of its proper divisors (14245803).

22623381 is a wasteful number, since it uses less digits than its factorization.

22623381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25414 (or 25405 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 22623381 is about 4756.4042090638. The cubic root of 22623381 is about 282.8258948165.

The spelling of 22623381 in words is "twenty-two million, six hundred twenty-three thousand, three hundred eighty-one".