22493481 has 4 divisors (see below), whose sum is σ = 29991312. Its totient is φ = 14995652.

The previous prime is 22493477. The next prime is 22493489. The reversal of 22493481 is 18439422.

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 22493481 - 2² = 22493477 is a prime.

It is a super-2 number, since 2×22493481² = 1011913374994722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22493489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3748911 + ... + 3748916.

It is an arithmetic number, because the mean of its divisors is an integer number (7497828).

Almost surely, 2^22493481 is an apocalyptic number.

It is an amenable number.

22493481 is a deficient number, since it is larger than the sum of its proper divisors (7497831).

22493481 is an equidigital number, since it uses as much as digits as its factorization.

22493481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7497830.

The product of its digits is 13824, while the sum is 33.

The square root of 22493481 is about 4742.7292775363. The cubic root of 22493481 is about 282.2835410802.

The spelling of 22493481 in words is "twenty-two million, four hundred ninety-three thousand, four hundred eighty-one".