18745386 has 32 divisors (see below), whose sum is σ = 41776128. Its totient is φ = 5558640.

The previous prime is 18745369. The next prime is 18745387. The reversal of 18745386 is 68354781.

It is not an unprimeable number, because it can be changed into a prime (18745387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81 + ... + 6123.

It is an arithmetic number, because the mean of its divisors is an integer number (1305504).

Almost surely, 2^18745386 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18745386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20888064).

18745386 is an abundant number, since it is smaller than the sum of its proper divisors (23030742).

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

18745386 is a wasteful number, since it uses less digits than its factorization.

18745386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6106.

The product of its digits is 161280, while the sum is 42.

The square root of 18745386 is about 4329.5942073132. The cubic root of 18745386 is about 265.6428489229.

It can be divided in two parts, 1874 and 5386, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 18745386 in words is "eighteen million, seven hundred forty-five thousand, three hundred eighty-six".