18501093 has 12 divisors (see below), whose sum is σ = 28779660. Its totient is φ = 11385216.

The previous prime is 18501061. The next prime is 18501103. The reversal of 18501093 is 39010581.

It can be written as a sum of positive squares in 2 ways, for example, as 4235364 + 14265729 = 2058^2 + 3777^2 .

It is not a de Polignac number, because 18501093 - 2⁵ = 18501061 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18501023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78948 + ... + 79181.

It is an arithmetic number, because the mean of its divisors is an integer number (2398305).

Almost surely, 2^18501093 is an apocalyptic number.

18501093 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18501093 is a deficient number, since it is larger than the sum of its proper divisors (10278567).

18501093 is a wasteful number, since it uses less digits than its factorization.

18501093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158148 (or 158145 counting only the distinct ones).

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

The square root of 18501093 is about 4301.2896903138. The cubic root of 18501093 is about 264.4838320931.

The spelling of 18501093 in words is "eighteen million, five hundred one thousand, ninety-three".