18699480 has 96 divisors (see below), whose sum is σ = 61401600. Its totient is φ = 4935168.

The previous prime is 18699449. The next prime is 18699487. The reversal of 18699480 is 8499681.

18699480 is a `hidden beast` number, since 1 + 86 + 99 + 480 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18699487) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45516 + ... + 45924.

It is an arithmetic number, because the mean of its divisors is an integer number (639600).

Almost surely, 2^18699480 is an apocalyptic number.

18699480 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 18699480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30700800).

18699480 is an abundant number, since it is smaller than the sum of its proper divisors (42702120).

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

18699480 is a wasteful number, since it uses less digits than its factorization.

18699480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553 (or 546 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 18699480 is about 4324.2895370222. The cubic root of 18699480 is about 265.4258254069.

The spelling of 18699480 in words is "eighteen million, six hundred ninety-nine thousand, four hundred eighty".