18502093 has 4 divisors (see below), whose sum is σ = 18805468. Its totient is φ = 18198720.

The previous prime is 18502079. The next prime is 18502123. The reversal of 18502093 is 39020581.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39020581 = 23 ⋅1696547.

It can be written as a sum of positive squares in 2 ways, for example, as 7828804 + 10673289 = 2798^2 + 3267^2 .

It is a cyclic number.

It is not a de Polignac number, because 18502093 - 2⁵ = 18502061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18502013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151596 + ... + 151717.

It is an arithmetic number, because the mean of its divisors is an integer number (4701367).

Almost surely, 2^18502093 is an apocalyptic number.

It is an amenable number.

18502093 is a deficient number, since it is larger than the sum of its proper divisors (303375).

18502093 is an equidigital number, since it uses as much as digits as its factorization.

18502093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303374.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 18502093 is about 4301.4059329480. The cubic root of 18502093 is about 264.4885972002.

The spelling of 18502093 in words is "eighteen million, five hundred two thousand, ninety-three".