18231102 has 32 divisors (see below), whose sum is σ = 41126400. Its totient is φ = 5985144.

The previous prime is 18231091. The next prime is 18231113. The reversal of 18231102 is 20113281.

It is an interprime number because it is at equal distance from previous prime (18231091) and next prime (18231113).

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 15 ways as a sum of consecutive naturals, for example, 1099 + ... + 6137.

It is an arithmetic number, because the mean of its divisors is an integer number (1285200).

Almost surely, 2^18231102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18231102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20563200).

18231102 is an abundant number, since it is smaller than the sum of its proper divisors (22895298).

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

18231102 is a wasteful number, since it uses less digits than its factorization.

18231102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5117 (or 5111 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 18231102 is about 4269.7894561676. The cubic root of 18231102 is about 263.1909632956.

Adding to 18231102 its reverse (20113281), we get a palindrome (38344383).

The spelling of 18231102 in words is "eighteen million, two hundred thirty-one thousand, one hundred two".