18261162 has 48 divisors (see below), whose sum is σ = 42456960. Its totient is φ = 5652096.

The previous prime is 18261137. The next prime is 18261163. The reversal of 18261162 is 26116281.

It is not an unprimeable number, because it can be changed into a prime (18261163) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 25039 + ... + 25757.

It is an arithmetic number, because the mean of its divisors is an integer number (884520).

Almost surely, 2^18261162 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18261162, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21228480).

18261162 is an abundant number, since it is smaller than the sum of its proper divisors (24195798).

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

18261162 is a wasteful number, since it uses less digits than its factorization.

18261162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827 (or 824 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 18261162 is about 4273.3080862489. The cubic root of 18261162 is about 263.3355363094.

The spelling of 18261162 in words is "eighteen million, two hundred sixty-one thousand, one hundred sixty-two".