18707480 has 128 divisors (see below), whose sum is σ = 50621760. Its totient is φ = 6144000.

The previous prime is 18707467. The next prime is 18707501. The reversal of 18707480 is 8470781.

It is a self number, because there is not a number n which added to its sum of digits gives 18707480.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 306650 + ... + 306710.

Almost surely, 2^18707480 is an apocalyptic number.

18707480 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 18707480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25310880).

18707480 is an abundant number, since it is smaller than the sum of its proper divisors (31914280).

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

18707480 is a wasteful number, since it uses less digits than its factorization.

18707480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 18707480 is about 4325.2144455506. The cubic root of 18707480 is about 265.4636714480.

It can be divided in two parts, 1870 and 7480, that multiplied together give a square (13987600 = 3740²).

The spelling of 18707480 in words is "eighteen million, seven hundred seven thousand, four hundred eighty".