18019460 has 12 divisors (see below), whose sum is σ = 37840908. Its totient is φ = 7207776.

The previous prime is 18019457. The next prime is 18019489. The reversal of 18019460 is 6491081.

It can be written as a sum of positive squares in 2 ways, for example, as 2637376 + 15382084 = 1624^2 + 3922^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 450467 + ... + 450506.

It is an arithmetic number, because the mean of its divisors is an integer number (3153409).

Almost surely, 2^18019460 is an apocalyptic number.

18019460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18019460 is an abundant number, since it is smaller than the sum of its proper divisors (19821448).

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

18019460 is a wasteful number, since it uses less digits than its factorization.

18019460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900982 (or 900980 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 18019460 is about 4244.9334505973. The cubic root of 18019460 is about 262.1685491613.

The spelling of 18019460 in words is "eighteen million, nineteen thousand, four hundred sixty".