18340620 has 48 divisors (see below), whose sum is σ = 54377568. Its totient is φ = 4602880.

The previous prime is 18340613. The next prime is 18340627. The reversal of 18340620 is 2604381.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18340613) and next prime (18340627).

It is not an unprimeable number, because it can be changed into a prime (18340627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7971 + ... + 10010.

It is an arithmetic number, because the mean of its divisors is an integer number (1132866).

Almost surely, 2^18340620 is an apocalyptic number.

18340620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18340620 is an abundant number, since it is smaller than the sum of its proper divisors (36036948).

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

18340620 is a wasteful number, since it uses less digits than its factorization.

18340620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18010 (or 18008 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 18340620 is about 4282.5950077027. The cubic root of 18340620 is about 263.7169256910.

Subtracting from 18340620 its sum of digits (24), we obtain a triangular number (18340596 = T₆₀₅₆).

The spelling of 18340620 in words is "eighteen million, three hundred forty thousand, six hundred twenty".