18474100 has 36 divisors (see below), whose sum is σ = 41180524. Its totient is φ = 7188480.

The previous prime is 18474097. The next prime is 18474107. The reversal of 18474100 is 147481.

It can be written as a sum of positive squares in 6 ways, for example, as 1296 + 18472804 = 36^2 + 4298^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18474107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1204 + ... + 6196.

Almost surely, 2^18474100 is an apocalyptic number.

18474100 is a gapful number since it is divisible by the number (10) 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 18474100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20590262).

18474100 is an abundant number, since it is smaller than the sum of its proper divisors (22706424).

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

18474100 is a wasteful number, since it uses less digits than its factorization.

18474100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5044 (or 5037 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 18474100 is about 4298.1507651547. The cubic root of 18474100 is about 264.3551426346.

The spelling of 18474100 in words is "eighteen million, four hundred seventy-four thousand, one hundred".