18347340 has 48 divisors (see below), whose sum is σ = 56044800. Its totient is φ = 4447680.

The previous prime is 18347297. The next prime is 18347383. The reversal of 18347340 is 4374381.

It is an interprime number because it is at equal distance from previous prime (18347297) and next prime (18347383).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 18347298 and 18347307.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13240 + ... + 14559.

It is an arithmetic number, because the mean of its divisors is an integer number (1167600).

Almost surely, 2^18347340 is an apocalyptic number.

18347340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18347340 is an abundant number, since it is smaller than the sum of its proper divisors (37697460).

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

18347340 is a wasteful number, since it uses less digits than its factorization.

18347340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27822 (or 27820 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 18347340 is about 4283.3795068847. The cubic root of 18347340 is about 263.7491303701.

The spelling of 18347340 in words is "eighteen million, three hundred forty-seven thousand, three hundred forty".