18087431330 has 16 divisors (see below), whose sum is σ = 34270922880. Its totient is φ = 6854184432.

The previous prime is 18087431281. The next prime is 18087431339. The reversal of 18087431330 is 3313478081.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (18087431339) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 47598314 + ... + 47598693.

It is an arithmetic number, because the mean of its divisors is an integer number (2141932680).

Almost surely, 2^18087431330 is an apocalyptic number.

18087431330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18087431330 is a deficient number, since it is larger than the sum of its proper divisors (16183491550).

18087431330 is a wasteful number, since it uses less digits than its factorization.

18087431330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95197033.

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 18087431330 in words is "eighteen billion, eighty-seven million, four hundred thirty-one thousand, three hundred thirty".