22403381 has 16 divisors (see below), whose sum is σ = 30081408. Its totient is φ = 16113600.

The previous prime is 22403377. The next prime is 22403383. The reversal of 22403381 is 18330422.

It is a cyclic number.

It is not a de Polignac number, because 22403381 - 2² = 22403377 is a prime.

It is a super-2 number, since 2×22403381² = 1003822960462322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22403383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10190 + ... + 12191.

It is an arithmetic number, because the mean of its divisors is an integer number (1880088).

Almost surely, 2^22403381 is an apocalyptic number.

It is an amenable number.

22403381 is a deficient number, since it is larger than the sum of its proper divisors (7678027).

22403381 is a wasteful number, since it uses less digits than its factorization.

22403381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22412.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 22403381 is about 4733.2209963195. The cubic root of 22403381 is about 281.9061312578.

The spelling of 22403381 in words is "twenty-two million, four hundred three thousand, three hundred eighty-one".