18204102 has 48 divisors (see below), whose sum is σ = 46755072. Its totient is φ = 5200200.

The previous prime is 18204091. The next prime is 18204113. The reversal of 18204102 is 20140281.

It is an interprime number because it is at equal distance from previous prime (18204091) and next prime (18204113).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 727 + ... + 6077.

It is an arithmetic number, because the mean of its divisors is an integer number (974064).

Almost surely, 2^18204102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18204102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23377536).

18204102 is an abundant number, since it is smaller than the sum of its proper divisors (28550970).

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

18204102 is an equidigital number, since it uses as much as digits as its factorization.

18204102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5375 (or 5363 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 18204102 is about 4266.6265362696. The cubic root of 18204102 is about 263.0609717582.

Adding to 18204102 its reverse (20140281), we get a palindrome (38344383).

The spelling of 18204102 in words is "eighteen million, two hundred four thousand, one hundred two".