18474072 has 32 divisors (see below), whose sum is σ = 46310400. Its totient is φ = 6141344.

The previous prime is 18474059. The next prime is 18474077. The reversal of 18474072 is 27047481.

It is a super-2 number, since 2×18474072² = 682582672522368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18474077) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 10693 + ... + 12299.

It is an arithmetic number, because the mean of its divisors is an integer number (1447200).

Almost surely, 2^18474072 is an apocalyptic number.

18474072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18474072 is an abundant number, since it is smaller than the sum of its proper divisors (27836328).

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

18474072 is a wasteful number, since it uses less digits than its factorization.

18474072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2095 (or 2091 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 18474072 is about 4298.1475079387. The cubic root of 18474072 is about 264.3550090792.

The spelling of 18474072 in words is "eighteen million, four hundred seventy-four thousand, seventy-two".