18361002 has 64 divisors (see below), whose sum is σ = 42456960. Its totient is φ = 5241600.

The previous prime is 18360997. The next prime is 18361051. The reversal of 18361002 is 20016381.

It is a self number, because there is not a number n which added to its sum of digits gives 18361002.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 101352 + ... + 101532.

It is an arithmetic number, because the mean of its divisors is an integer number (663390).

Almost surely, 2^18361002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18361002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21228480).

18361002 is an abundant number, since it is smaller than the sum of its proper divisors (24095958).

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

18361002 is a wasteful number, since it uses less digits than its factorization.

18361002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 18361002 is about 4284.9739789175. The cubic root of 18361002 is about 263.8145793961.

Adding to 18361002 its reverse (20016381), we get a palindrome (38377383).

The spelling of 18361002 in words is "eighteen million, three hundred sixty-one thousand, two".