18430728685 has 8 divisors (see below), whose sum is σ = 22830322176. Its totient is φ = 14268951120.

The previous prime is 18430728649. The next prime is 18430728691. The reversal of 18430728685 is 58682703481.

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

It is not a de Polignac number, because 18430728685 - 2¹¹ = 18430726637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59453809 + ... + 59454118.

It is an arithmetic number, because the mean of its divisors is an integer number (2853790272).

Almost surely, 2^18430728685 is an apocalyptic number.

It is an amenable number.

18430728685 is a deficient number, since it is larger than the sum of its proper divisors (4399593491).

18430728685 is a wasteful number, since it uses less digits than its factorization.

18430728685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118907963.

The product of its (nonzero) digits is 2580480, while the sum is 52.

The spelling of 18430728685 in words is "eighteen billion, four hundred thirty million, seven hundred twenty-eight thousand, six hundred eighty-five".