18351996 has 48 divisors (see below), whose sum is σ = 47115264. Its totient is φ = 5524416.

The previous prime is 18351989. The next prime is 18352001. The reversal of 18351996 is 69915381.

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 15 ways as a sum of consecutive naturals, for example, 6081 + ... + 8583.

It is an arithmetic number, because the mean of its divisors is an integer number (981568).

Almost surely, 2^18351996 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 18351996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23557632).

18351996 is an abundant number, since it is smaller than the sum of its proper divisors (28763268).

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

18351996 is a wasteful number, since it uses less digits than its factorization.

18351996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2570 (or 2568 counting only the distinct ones).

The product of its digits is 58320, while the sum is 42.

The square root of 18351996 is about 4283.9229684951. The cubic root of 18351996 is about 263.7714390006.

The spelling of 18351996 in words is "eighteen million, three hundred fifty-one thousand, nine hundred ninety-six".