18051093 has 20 divisors (see below), whose sum is σ = 28553580. Its totient is φ = 11325312.

The previous prime is 18051071. The next prime is 18051101. The reversal of 18051093 is 39015081.

It can be written as a sum of positive squares in 2 ways, for example, as 10614564 + 7436529 = 3258^2 + 2727^2 .

It is not a de Polignac number, because 18051093 - 2¹⁰ = 18050069 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18051493) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5178 + ... + 7931.

It is an arithmetic number, because the mean of its divisors is an integer number (1427679).

Almost surely, 2^18051093 is an apocalyptic number.

It is an amenable number.

18051093 is a deficient number, since it is larger than the sum of its proper divisors (10502487).

18051093 is a wasteful number, since it uses less digits than its factorization.

18051093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13138 (or 13129 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 18051093 is about 4248.6577880550. The cubic root of 18051093 is about 262.3218709881.

The spelling of 18051093 in words is "eighteen million, fifty-one thousand, ninety-three".