18241804 has 48 divisors (see below), whose sum is σ = 37945600. Its totient is φ = 7511616.

The previous prime is 18241801. The next prime is 18241807. The reversal of 18241804 is 40814281.

It is an interprime number because it is at equal distance from previous prime (18241801) and next prime (18241807).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (18241801) 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, 131167 + ... + 131305.

Almost surely, 2^18241804 is an apocalyptic number.

18241804 is a gapful number since it is divisible by the number (14) 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 18241804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18972800).

18241804 is an abundant number, since it is smaller than the sum of its proper divisors (19703796).

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

18241804 is a wasteful number, since it uses less digits than its factorization.

18241804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 28.

The square root of 18241804 is about 4271.0424956912. The cubic root of 18241804 is about 263.2424525715.

The spelling of 18241804 in words is "eighteen million, two hundred forty-one thousand, eight hundred four".