18213696 has 84 divisors (see below), whose sum is σ = 52884832. Its totient is φ = 5992704.

The previous prime is 18213667. The next prime is 18213703. The reversal of 18213696 is 69631281.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 18213696.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 59175 + ... + 59481.

Almost surely, 2^18213696 is an apocalyptic number.

18213696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18213696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26442416).

18213696 is an abundant number, since it is smaller than the sum of its proper divisors (34671136).

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

18213696 is a wasteful number, since it uses less digits than its factorization.

18213696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428 (or 415 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 18213696 is about 4267.7506956241. The cubic root of 18213696 is about 263.1071767971.

The spelling of 18213696 in words is "eighteen million, two hundred thirteen thousand, six hundred ninety-six".