18490680 has 160 divisors (see below), whose sum is σ = 67082400. Its totient is φ = 4541184.

The previous prime is 18490673. The next prime is 18490691. The reversal of 18490680 is 8609481.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 41901 + ... + 42339.

It is an arithmetic number, because the mean of its divisors is an integer number (419265).

Almost surely, 2^18490680 is an apocalyptic number.

18490680 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 18490680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33541200).

18490680 is an abundant number, since it is smaller than the sum of its proper divisors (48591720).

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

18490680 is a wasteful number, since it uses less digits than its factorization.

18490680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475 (or 462 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 18490680 is about 4300.0790690405. The cubic root of 18490680 is about 264.4342028271.

The spelling of 18490680 in words is "eighteen million, four hundred ninety thousand, six hundred eighty".