18654729439 has 8 divisors (see below), whose sum is σ = 19879971840. Its totient is φ = 17464001016.

The previous prime is 18654729433. The next prime is 18654729487. The reversal of 18654729439 is 93492745681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18654729439 - 2¹⁹ = 18654205151 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 (18654729433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8627379 + ... + 8629540.

It is an arithmetic number, because the mean of its divisors is an integer number (2484996480).

Almost surely, 2^18654729439 is an apocalyptic number.

18654729439 is a deficient number, since it is larger than the sum of its proper divisors (1225242401).

18654729439 is a wasteful number, since it uses less digits than its factorization.

18654729439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17256989.

The product of its digits is 13063680, while the sum is 58.

The spelling of 18654729439 in words is "eighteen billion, six hundred fifty-four million, seven hundred twenty-nine thousand, four hundred thirty-nine".