18444722 has 8 divisors (see below), whose sum is σ = 28414956. Its totient is φ = 8973072.

The previous prime is 18444707. The next prime is 18444731. The reversal of 18444722 is 22744481.

It can be written as a sum of positive squares in 2 ways, for example, as 18412681 + 32041 = 4291^2 + 179^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124553 + ... + 124700.

Almost surely, 2^18444722 is an apocalyptic number.

18444722 is a deficient number, since it is larger than the sum of its proper divisors (9970234).

18444722 is a wasteful number, since it uses less digits than its factorization.

18444722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249292.

The product of its digits is 14336, while the sum is 32.

The square root of 18444722 is about 4294.7318891870. The cubic root of 18444722 is about 264.2149401221.

The spelling of 18444722 in words is "eighteen million, four hundred forty-four thousand, seven hundred twenty-two".