18013930 has 32 divisors (see below), whose sum is σ = 36599040. Its totient is φ = 6323520.

The previous prime is 18013921. The next prime is 18013981. The reversal of 18013930 is 3931081.

It is a junction number, because it is equal to n+sod(n) for n = 18013895 and 18013904.

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, 367 + ... + 6013.

It is an arithmetic number, because the mean of its divisors is an integer number (1143720).

Almost surely, 2^18013930 is an apocalyptic number.

18013930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18013930 is an abundant number, since it is smaller than the sum of its proper divisors (18585110).

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

18013930 is a wasteful number, since it uses less digits than its factorization.

18013930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5694.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 18013930 is about 4244.2820358690. The cubic root of 18013930 is about 262.1417274102.

The spelling of 18013930 in words is "eighteen million, thirteen thousand, nine hundred thirty".