18634054729 has 4 divisors (see below), whose sum is σ = 18826158484. Its totient is φ = 18441950976.

The previous prime is 18634054721. The next prime is 18634054753. The reversal of 18634054729 is 92745043681.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15214729104 + 3419325625 = 123348^2 + 58475^2 .

It is a cyclic number.

It is not a de Polignac number, because 18634054729 - 2³ = 18634054721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18634054721) 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, 96051732 + ... + 96051925.

It is an arithmetic number, because the mean of its divisors is an integer number (4706539621).

It is a 2-persistent number, because it is pandigital, and so is 2⋅18634054729 = 37268109458, but 3⋅18634054729 = 55902164187 is not.

Almost surely, 2^18634054729 is an apocalyptic number.

It is an amenable number.

18634054729 is a deficient number, since it is larger than the sum of its proper divisors (192103755).

18634054729 is an equidigital number, since it uses as much as digits as its factorization.

18634054729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192103754.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 18634054729 in words is "eighteen billion, six hundred thirty-four million, fifty-four thousand, seven hundred twenty-nine".