18426272 has 12 divisors (see below), whose sum is σ = 36276786. Its totient is φ = 9213120.

The previous prime is 18426269. The next prime is 18426277. The reversal of 18426272 is 27262481.

It can be written as a sum of positive squares in only one way, i.e., 18011536 + 414736 = 4244^2 + 644^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 575821 = 18426272 / (1 + 8 + 4 + 2 + 6 + 2 + 7 + 2).

It is not an unprimeable number, because it can be changed into a prime (18426277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 287879 + ... + 287942.

Almost surely, 2^18426272 is an apocalyptic number.

It is an amenable number.

18426272 is a deficient number, since it is larger than the sum of its proper divisors (17850514).

18426272 is an equidigital number, since it uses as much as digits as its factorization.

18426272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575831 (or 575823 counting only the distinct ones).

The product of its digits is 10752, while the sum is 32.

The square root of 18426272 is about 4292.5833713511. The cubic root of 18426272 is about 264.1268138832.

The spelling of 18426272 in words is "eighteen million, four hundred twenty-six thousand, two hundred seventy-two".