18434836 has 48 divisors (see below), whose sum is σ = 38787840. Its totient is φ = 7499520.

The previous prime is 18434833. The next prime is 18434861. The reversal of 18434836 is 63843481.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18434795 and 18434804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18434833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59121 + ... + 59431.

It is an arithmetic number, because the mean of its divisors is an integer number (808080).

Almost surely, 2^18434836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18434836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19393920).

18434836 is an abundant number, since it is smaller than the sum of its proper divisors (20353004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18434836 is a wasteful number, since it uses less digits than its factorization.

18434836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424 (or 422 counting only the distinct ones).

The product of its digits is 55296, while the sum is 37.

The square root of 18434836 is about 4293.5807899701. The cubic root of 18434836 is about 264.1677270549.

The spelling of 18434836 in words is "eighteen million, four hundred thirty-four thousand, eight hundred thirty-six".