18361902 has 32 divisors (see below), whose sum is σ = 39836160. Its totient is φ = 5608800.

The previous prime is 18361897. The next prime is 18361957. The reversal of 18361902 is 20916381.

It is a self number, because there is not a number n which added to its sum of digits gives 18361902.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10999 + ... + 12557.

It is an arithmetic number, because the mean of its divisors is an integer number (1244880).

Almost surely, 2^18361902 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18361902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19918080).

18361902 is an abundant number, since it is smaller than the sum of its proper divisors (21474258).

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

18361902 is a wasteful number, since it uses less digits than its factorization.

18361902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1728.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 18361902 is about 4285.0789957713. The cubic root of 18361902 is about 263.8188897862.

The spelling of 18361902 in words is "eighteen million, three hundred sixty-one thousand, nine hundred two".