18139482521903 has 4 divisors (see below), whose sum is σ = 18764981919240. Its totient is φ = 17513983124568.

The previous prime is 18139482521899. The next prime is 18139482521981. The reversal of 18139482521903 is 30912528493181.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18139482521903 - 2² = 18139482521899 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18139482521603) 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, 312749698625 + ... + 312749698682.

It is an arithmetic number, because the mean of its divisors is an integer number (4691245479810).

Almost surely, 2^{18139482521903} is an apocalyptic number.

18139482521903 is a deficient number, since it is larger than the sum of its proper divisors (625499397337).

18139482521903 is an equidigital number, since it uses as much as digits as its factorization.

18139482521903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625499397336.

The product of its (nonzero) digits is 3732480, while the sum is 56.

The spelling of 18139482521903 in words is "eighteen trillion, one hundred thirty-nine billion, four hundred eighty-two million, five hundred twenty-one thousand, nine hundred three".