18141493 has 8 divisors (see below), whose sum is σ = 18532800. Its totient is φ = 17754528.

The previous prime is 18141491. The next prime is 18141509. The reversal of 18141493 is 39414181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18141493 - 2¹ = 18141491 is a prime.

It is a super-2 number, since 2×18141493² = 658227536538098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18141491) 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 7 ways as a sum of consecutive naturals, for example, 8178 + ... + 10156.

It is an arithmetic number, because the mean of its divisors is an integer number (2316600).

Almost surely, 2^18141493 is an apocalyptic number.

It is an amenable number.

18141493 is a deficient number, since it is larger than the sum of its proper divisors (391307).

18141493 is a wasteful number, since it uses less digits than its factorization.

18141493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2171.

The product of its digits is 3456, while the sum is 31.

The square root of 18141493 is about 4259.2831556496. The cubic root of 18141493 is about 262.7590452625.

The spelling of 18141493 in words is "eighteen million, one hundred forty-one thousand, four hundred ninety-three".