18351040 has 28 divisors (see below), whose sum is σ = 43699176. Its totient is φ = 7340288.

The previous prime is 18351031. The next prime is 18351043. The reversal of 18351040 is 4015381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18351043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28354 + ... + 28993.

Almost surely, 2^18351040 is an apocalyptic number.

18351040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18351040 is an abundant number, since it is smaller than the sum of its proper divisors (25348136).

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

18351040 is an equidigital number, since it uses as much as digits as its factorization.

18351040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57364 (or 57354 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 18351040 is about 4283.8113870711. The cubic root of 18351040 is about 263.7668587563.

The spelling of 18351040 in words is "eighteen million, three hundred fifty-one thousand, forty".