18513108 has 36 divisors (see below), whose sum is σ = 47462688. Its totient is φ = 6083280.

The previous prime is 18513043. The next prime is 18513113. The reversal of 18513108 is 80131581.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1066 + ... + 6177.

It is an arithmetic number, because the mean of its divisors is an integer number (1318408).

Almost surely, 2^18513108 is an apocalyptic number.

18513108 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18513108 is an abundant number, since it is smaller than the sum of its proper divisors (28949580).

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

18513108 is a wasteful number, since it uses less digits than its factorization.

18513108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7324 (or 7319 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 27.

The square root of 18513108 is about 4302.6861377516. The cubic root of 18513108 is about 264.5410734966.

Adding to 18513108 its reverse (80131581), we get a palindrome (98644689).

The spelling of 18513108 in words is "eighteen million, five hundred thirteen thousand, one hundred eight".