18374040 has 160 divisors (see below), whose sum is σ = 63510480. Its totient is φ = 4762368.

The previous prime is 18374011. The next prime is 18374047. The reversal of 18374040 is 4047381.

18374040 = T₂₆₁ + T₂₆₂ + ... + T₅₀₃.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 18373995 and 18374013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18374047) 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 39 ways as a sum of consecutive naturals, for example, 171667 + ... + 171773.

Almost surely, 2^18374040 is an apocalyptic number.

18374040 is a gapful number since it is divisible by the number (10) 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 18374040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31755240).

18374040 is an abundant number, since it is smaller than the sum of its proper divisors (45136440).

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

18374040 is a wasteful number, since it uses less digits than its factorization.

18374040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 18374040 is about 4286.4950717340. The cubic root of 18374040 is about 263.8770088260.

The spelling of 18374040 in words is "eighteen million, three hundred seventy-four thousand, forty".