18653934 has 64 divisors (see below), whose sum is σ = 43464960. Its totient is φ = 5287680.

The previous prime is 18653923. The next prime is 18653963. The reversal of 18653934 is 43935681.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 18653892 and 18653901.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60609 + ... + 60915.

It is an arithmetic number, because the mean of its divisors is an integer number (679140).

Almost surely, 2^18653934 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18653934, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21732480).

18653934 is an abundant number, since it is smaller than the sum of its proper divisors (24811026).

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

18653934 is a wasteful number, since it uses less digits than its factorization.

18653934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385.

The product of its digits is 77760, while the sum is 39.

The square root of 18653934 is about 4319.0200277378. The cubic root of 18653934 is about 265.2101525111.

The spelling of 18653934 in words is "eighteen million, six hundred fifty-three thousand, nine hundred thirty-four".