22404981 has 8 divisors (see below), whose sum is σ = 30074400. Its totient is φ = 14836112.

The previous prime is 22404979. The next prime is 22404989. The reversal of 22404981 is 18940422.

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 22404981 - 2¹ = 22404979 is a prime.

It is a super-2 number, since 2×22404981² = 1003966347220722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22404989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24615 + ... + 25508.

It is an arithmetic number, because the mean of its divisors is an integer number (3759300).

Almost surely, 2^22404981 is an apocalyptic number.

It is an amenable number.

22404981 is a deficient number, since it is larger than the sum of its proper divisors (7669419).

22404981 is a wasteful number, since it uses less digits than its factorization.

22404981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50275.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 22404981 is about 4733.3900113978. The cubic root of 22404981 is about 281.9128421358.

The spelling of 22404981 in words is "twenty-two million, four hundred four thousand, nine hundred eighty-one".