18002313972 has 36 divisors (see below), whose sum is σ = 45785041120. Its totient is φ = 5963954832.

The previous prime is 18002313947. The next prime is 18002313997. The reversal of 18002313972 is 27931320081.

It is an interprime number because it is at equal distance from previous prime (18002313947) and next prime (18002313997).

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

It is a Harshad number since it is a multiple of its sum of digits (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, 1528072 + ... + 1539807.

Almost surely, 2^18002313972 is an apocalyptic number.

18002313972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18002313972 is an abundant number, since it is smaller than the sum of its proper divisors (27782727148).

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

18002313972 is a wasteful number, since it uses less digits than its factorization.

18002313972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3068052 (or 3068047 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The spelling of 18002313972 in words is "eighteen billion, two million, three hundred thirteen thousand, nine hundred seventy-two".