18003868752 has 20 divisors (see below), whose sum is σ = 46509994400. Its totient is φ = 6001289568.

The previous prime is 18003868697. The next prime is 18003868777. The reversal of 18003868752 is 25786830081.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 375080599 = 18003868752 / (1 + 8 + 0 + 0 + 3 + 8 + 6 + 8 + 7 + 5 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187540252 + ... + 187540347.

It is an arithmetic number, because the mean of its divisors is an integer number (2325499720).

Almost surely, 2^18003868752 is an apocalyptic number.

18003868752 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18003868752 is an abundant number, since it is smaller than the sum of its proper divisors (28506125648).

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

18003868752 is a wasteful number, since it uses less digits than its factorization.

18003868752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375080610 (or 375080604 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 18003868752 in words is "eighteen billion, three million, eight hundred sixty-eight thousand, seven hundred fifty-two".