18469224 has 24 divisors (see below), whose sum is σ = 50021010. Its totient is φ = 6156384.

The previous prime is 18469181. The next prime is 18469277. The reversal of 18469224 is 42296481.

It can be written as a sum of positive squares in only one way, i.e., 17489124 + 980100 = 4182^2 + 990^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×18469224² = 682224470324352, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 128187 + ... + 128330.

Almost surely, 2^18469224 is an apocalyptic number.

It is an amenable number.

18469224 is an abundant number, since it is smaller than the sum of its proper divisors (31551786).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18469224 is a wasteful number, since it uses less digits than its factorization.

18469224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256529 (or 256522 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 18469224 is about 4297.5835070421. The cubic root of 18469224 is about 264.3318828800.

The spelling of 18469224 in words is "eighteen million, four hundred sixty-nine thousand, two hundred twenty-four".