18900634743 has 8 divisors (see below), whose sum is σ = 28000940400. Its totient is φ = 12600423144.

The previous prime is 18900634723. The next prime is 18900634747. The reversal of 18900634743 is 34743600981.

18900634743 is a `hidden beast` number, since 1 + 8 + 9 + 0 + 0 + 634 + 7 + 4 + 3 = 666.

It is not a de Polignac number, because 18900634743 - 2¹² = 18900630647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18900634747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350011728 + ... + 350011781.

It is an arithmetic number, because the mean of its divisors is an integer number (3500117550).

Almost surely, 2^18900634743 is an apocalyptic number.

18900634743 is a deficient number, since it is larger than the sum of its proper divisors (9100305657).

18900634743 is an equidigital number, since it uses as much as digits as its factorization.

18900634743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700023518 (or 700023512 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 18900634743 in words is "eighteen billion, nine hundred million, six hundred thirty-four thousand, seven hundred forty-three".