18474372 has 72 divisors (see below), whose sum is σ = 55732320. Its totient is φ = 5276880.

The previous prime is 18474371. The next prime is 18474373. The reversal of 18474372 is 27347481.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18474371) and next prime (18474373).

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

It is not an unprimeable number, because it can be changed into a prime (18474371) 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 23 ways as a sum of consecutive naturals, for example, 3547 + ... + 7037.

It is an arithmetic number, because the mean of its divisors is an integer number (774060).

Almost surely, 2^18474372 is an apocalyptic number.

18474372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18474372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27866160).

18474372 is an abundant number, since it is smaller than the sum of its proper divisors (37257948).

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

18474372 is a wasteful number, since it uses less digits than its factorization.

18474372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3518 (or 3503 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 18474372 is about 4298.1824065528. The cubic root of 18474372 is about 264.3564400229.

The spelling of 18474372 in words is "eighteen million, four hundred seventy-four thousand, three hundred seventy-two".