18434857 has 16 divisors (see below), whose sum is σ = 21726720. Its totient is φ = 15314688.

The previous prime is 18434833. The next prime is 18434861. The reversal of 18434857 is 75843481.

It is a cyclic number.

It is not a de Polignac number, because 18434857 - 2¹¹ = 18432809 is a prime.

It is a super-2 number, since 2×18434857² = 679687905220898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18434827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44869 + ... + 45277.

It is an arithmetic number, because the mean of its divisors is an integer number (1357920).

Almost surely, 2^18434857 is an apocalyptic number.

It is an amenable number.

18434857 is a deficient number, since it is larger than the sum of its proper divisors (3291863).

18434857 is a wasteful number, since it uses less digits than its factorization.

18434857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600.

The product of its digits is 107520, while the sum is 40.

The square root of 18434857 is about 4293.5832354806. The cubic root of 18434857 is about 264.1678273635.

It can be divided in two parts, 18434 and 857, that added together give a palindrome (19291).

The spelling of 18434857 in words is "eighteen million, four hundred thirty-four thousand, eight hundred fifty-seven".