18740320 has 24 divisors (see below), whose sum is σ = 44274384. Its totient is φ = 7496064.

The previous prime is 18740317. The next prime is 18740329. The reversal of 18740320 is 2304781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18740329) 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, 58404 + ... + 58723.

It is an arithmetic number, because the mean of its divisors is an integer number (1844766).

Almost surely, 2^18740320 is an apocalyptic number.

18740320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18740320 is an abundant number, since it is smaller than the sum of its proper divisors (25534064).

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

18740320 is a wasteful number, since it uses less digits than its factorization.

18740320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117142 (or 117134 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 18740320 is about 4329.0091244995. The cubic root of 18740320 is about 265.6189164927.

The spelling of 18740320 in words is "eighteen million, seven hundred forty thousand, three hundred twenty".