18713940 has 96 divisors (see below), whose sum is σ = 63431424. Its totient is φ = 4024320.

The previous prime is 18713921. The next prime is 18713951. The reversal of 18713940 is 4931781.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5830 + ... + 8450.

It is an arithmetic number, because the mean of its divisors is an integer number (660744).

Almost surely, 2^18713940 is an apocalyptic number.

18713940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18713940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31715712).

18713940 is an abundant number, since it is smaller than the sum of its proper divisors (44717484).

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

18713940 is a wasteful number, since it uses less digits than its factorization.

18713940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2657 (or 2655 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 18713940 is about 4325.9611648742. The cubic root of 18713940 is about 265.4942242529.

The spelling of 18713940 in words is "eighteen million, seven hundred thirteen thousand, nine hundred forty".