18993696 has 48 divisors (see below), whose sum is σ = 50619744. Its totient is φ = 6234624.

The previous prime is 18993683. The next prime is 18993697. The reversal of 18993696 is 69639981.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (18993697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4956 + ... + 7908.

It is an arithmetic number, because the mean of its divisors is an integer number (1054578).

Almost surely, 2^18993696 is an apocalyptic number.

18993696 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 18993696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25309872).

18993696 is an abundant number, since it is smaller than the sum of its proper divisors (31626048).

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

18993696 is a wasteful number, since it uses less digits than its factorization.

18993696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3033 (or 3025 counting only the distinct ones).

The product of its digits is 629856, while the sum is 51.

The square root of 18993696 is about 4358.1757651568. The cubic root of 18993696 is about 266.8106500218.

The spelling of 18993696 in words is "eighteen million, nine hundred ninety-three thousand, six hundred ninety-six".