18499480 has 32 divisors (see below), whose sum is σ = 42015600. Its totient is φ = 7330176.

The previous prime is 18499447. The next prime is 18499489. The reversal of 18499480 is 8499481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18499489) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2239 + ... + 6481.

Almost surely, 2^18499480 is an apocalyptic number.

18499480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18499480 is an abundant number, since it is smaller than the sum of its proper divisors (23516120).

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

18499480 is a wasteful number, since it uses less digits than its factorization.

18499480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4363 (or 4359 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 18499480 is about 4301.1021843244. The cubic root of 18499480 is about 264.4761456136.

Subtracting from 18499480 its reverse (8499481), we obtain a palindrome (9999999).

It can be divided in two parts, 184994 and 80, that multiplied together give a triangular number (14799520 = T₅₄₄₀).

The spelling of 18499480 in words is "eighteen million, four hundred ninety-nine thousand, four hundred eighty".