18900503922743 has 4 divisors (see below), whose sum is σ = 18900565533240. Its totient is φ = 18900442312248.

The previous prime is 18900503922731. The next prime is 18900503922809. The reversal of 18900503922743 is 34722930500981.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18900503922743 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 (18900503921743) 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, 30342773 + ... + 30959406.

It is an arithmetic number, because the mean of its divisors is an integer number (4725141383310).

Almost surely, 2^{18900503922743} is an apocalyptic number.

18900503922743 is a deficient number, since it is larger than the sum of its proper divisors (61610497).

18900503922743 is an equidigital number, since it uses as much as digits as its factorization.

18900503922743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61610496.

The product of its (nonzero) digits is 3265920, while the sum is 53.

The spelling of 18900503922743 in words is "eighteen trillion, nine hundred billion, five hundred three million, nine hundred twenty-two thousand, seven hundred forty-three".