18046940 has 12 divisors (see below), whose sum is σ = 37898616. Its totient is φ = 7218768.

The previous prime is 18046937. The next prime is 18046943. The reversal of 18046940 is 4964081.

It is an interprime number because it is at equal distance from previous prime (18046937) and next prime (18046943).

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18046897 and 18046906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18046943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 451154 + ... + 451193.

It is an arithmetic number, because the mean of its divisors is an integer number (3158218).

Almost surely, 2^18046940 is an apocalyptic number.

18046940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18046940 is an abundant number, since it is smaller than the sum of its proper divisors (19851676).

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

18046940 is a wasteful number, since it uses less digits than its factorization.

18046940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902356 (or 902354 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 18046940 is about 4248.1690173532. The cubic root of 18046940 is about 262.3017520533.

The spelling of 18046940 in words is "eighteen million, forty-six thousand, nine hundred forty".