18429389857 has 8 divisors (see below), whose sum is σ = 19026282240. Its totient is φ = 17832647280.

The previous prime is 18429389843. The next prime is 18429389863. The reversal of 18429389857 is 75898392481.

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

It is a cyclic number.

It is not a de Polignac number, because 18429389857 - 2³¹ = 16281906209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18429389827) 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, 246978 + ... + 312820.

It is an arithmetic number, because the mean of its divisors is an integer number (2378285280).

Almost surely, 2^18429389857 is an apocalyptic number.

It is an amenable number.

18429389857 is a deficient number, since it is larger than the sum of its proper divisors (596892383).

18429389857 is an equidigital number, since it uses as much as digits as its factorization.

18429389857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74903.

The product of its digits is 34836480, while the sum is 64.

The spelling of 18429389857 in words is "eighteen billion, four hundred twenty-nine million, three hundred eighty-nine thousand, eight hundred fifty-seven".