18373806 has 48 divisors (see below), whose sum is σ = 44074368. Its totient is φ = 5485200.

The previous prime is 18373801. The next prime is 18373807. The reversal of 18373806 is 60837381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18373801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13405 + ... + 14711.

It is an arithmetic number, because the mean of its divisors is an integer number (918216).

Almost surely, 2^18373806 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18373806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22037184).

18373806 is an abundant number, since it is smaller than the sum of its proper divisors (25700562).

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

18373806 is a wasteful number, since it uses less digits than its factorization.

18373806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397 (or 1394 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 18373806 is about 4286.4677766198. The cubic root of 18373806 is about 263.8758886318.

The spelling of 18373806 in words is "eighteen million, three hundred seventy-three thousand, eight hundred six".