18361026 has 32 divisors (see below), whose sum is σ = 41385600. Its totient is φ = 6032880.

The previous prime is 18360997. The next prime is 18361051. The reversal of 18361026 is 62016381.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 1440 + ... + 6228.

It is an arithmetic number, because the mean of its divisors is an integer number (1293300).

Almost surely, 2^18361026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18361026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20692800).

18361026 is an abundant number, since it is smaller than the sum of its proper divisors (23024574).

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

18361026 is a wasteful number, since it uses less digits than its factorization.

18361026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4871 (or 4865 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 18361026 is about 4284.9767794003. The cubic root of 18361026 is about 263.8146943417.

The spelling of 18361026 in words is "eighteen million, three hundred sixty-one thousand, twenty-six".