18629680 has 20 divisors (see below), whose sum is σ = 43314192. Its totient is φ = 7451840.

The previous prime is 18629669. The next prime is 18629693. The reversal of 18629680 is 8692681.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

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, 116356 + ... + 116515.

Almost surely, 2^18629680 is an apocalyptic number.

18629680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18629680 is an abundant number, since it is smaller than the sum of its proper divisors (24684512).

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

18629680 is a wasteful number, since it uses less digits than its factorization.

18629680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232884 (or 232878 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 18629680 is about 4316.2113015931. The cubic root of 18629680 is about 265.0951598438.

The spelling of 18629680 in words is "eighteen million, six hundred twenty-nine thousand, six hundred eighty".