18870350388 has 12 divisors (see below), whose sum is σ = 44030817600. Its totient is φ = 6290116792.

The previous prime is 18870350381. The next prime is 18870350413. The reversal of 18870350388 is 88305307881.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 18870350388.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18870350381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 786264588 + ... + 786264611.

It is an arithmetic number, because the mean of its divisors is an integer number (3669234800).

Almost surely, 2^18870350388 is an apocalyptic number.

It is an amenable number.

18870350388 is an abundant number, since it is smaller than the sum of its proper divisors (25160467212).

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

18870350388 is a wasteful number, since it uses less digits than its factorization.

18870350388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1572529206 (or 1572529204 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 51.

The spelling of 18870350388 in words is "eighteen billion, eight hundred seventy million, three hundred fifty thousand, three hundred eighty-eight".