18361122 has 64 divisors (see below), whose sum is σ = 42747264. Its totient is φ = 5207040.

The previous prime is 18361117. The next prime is 18361127. The reversal of 18361122 is 22116381.

Added to its reverse (22116381) it gives a triangular number (40477503 = T₈₉₉₇).

It is an interprime number because it is at equal distance from previous prime (18361117) and next prime (18361127).

It is a junction number, because it is equal to n+sod(n) for n = 18361092 and 18361101.

It is not an unprimeable number, because it can be changed into a prime (18361127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80773 + ... + 80999.

It is an arithmetic number, because the mean of its divisors is an integer number (667926).

Almost surely, 2^18361122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18361122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21373632).

18361122 is an abundant number, since it is smaller than the sum of its proper divisors (24386142).

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

18361122 is a wasteful number, since it uses less digits than its factorization.

18361122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323.

The product of its digits is 576, while the sum is 24.

The square root of 18361122 is about 4284.9879813134. The cubic root of 18361122 is about 263.8151541230.

Adding to 18361122 its reverse (22116381), we get a triangular number (40477503 = T₈₉₉₇).

The spelling of 18361122 in words is "eighteen million, three hundred sixty-one thousand, one hundred twenty-two".