18234617857 has 8 divisors (see below), whose sum is σ = 18733210272. Its totient is φ = 17738589600.

The previous prime is 18234617837. The next prime is 18234617881. The reversal of 18234617857 is 75871643281.

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 18234617857 - 2³¹ = 16087134209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18234617827) 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, 626619 + ... + 655072.

It is an arithmetic number, because the mean of its divisors is an integer number (2341651284).

Almost surely, 2^18234617857 is an apocalyptic number.

It is an amenable number.

18234617857 is a deficient number, since it is larger than the sum of its proper divisors (498592415).

18234617857 is a wasteful number, since it uses less digits than its factorization.

18234617857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282079.

The product of its digits is 2257920, while the sum is 52.

The spelling of 18234617857 in words is "eighteen billion, two hundred thirty-four million, six hundred seventeen thousand, eight hundred fifty-seven".