18031480 has 16 divisors (see below), whose sum is σ = 40570920. Its totient is φ = 7212576.

The previous prime is 18031463. The next prime is 18031483. The reversal of 18031480 is 8413081.

It is a super-3 number, since 3×18031480³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18031483) 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 3 ways as a sum of consecutive naturals, for example, 225354 + ... + 225433.

Almost surely, 2^18031480 is an apocalyptic number.

18031480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18031480 is an abundant number, since it is smaller than the sum of its proper divisors (22539440).

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

18031480 is a wasteful number, since it uses less digits than its factorization.

18031480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450798 (or 450794 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 18031480 is about 4246.3490200406. The cubic root of 18031480 is about 262.2268299594.

It can be divided in two parts, 18031 and 480, that multiplied together give a triangular number (8654880 = T₄₁₆₀).

The spelling of 18031480 in words is "eighteen million, thirty-one thousand, four hundred eighty".