18072017388 has 36 divisors (see below), whose sum is σ = 45743927320. Its totient is φ = 6015845376.

The previous prime is 18072017357. The next prime is 18072017407. The reversal of 18072017388 is 88371027081.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 313045 + ... + 366252.

Almost surely, 2^18072017388 is an apocalyptic number.

18072017388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18072017388 is an abundant number, since it is smaller than the sum of its proper divisors (27671909932).

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

18072017388 is a wasteful number, since it uses less digits than its factorization.

18072017388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680046 (or 680041 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 45.

The spelling of 18072017388 in words is "eighteen billion, seventy-two million, seventeen thousand, three hundred eighty-eight".