18061893 has 8 divisors (see below), whose sum is σ = 26758400. Its totient is φ = 12041244.

The previous prime is 18061891. The next prime is 18061907. The reversal of 18061893 is 39816081.

It is not a de Polignac number, because 18061893 - 2¹ = 18061891 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 (18061891) 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, 334453 + ... + 334506.

It is an arithmetic number, because the mean of its divisors is an integer number (3344800).

Almost surely, 2^18061893 is an apocalyptic number.

It is an amenable number.

18061893 is a deficient number, since it is larger than the sum of its proper divisors (8696507).

18061893 is an equidigital number, since it uses as much as digits as its factorization.

18061893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668968 (or 668962 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 18061893 is about 4249.9285876353. The cubic root of 18061893 is about 262.3741764336.

The spelling of 18061893 in words is "eighteen million, sixty-one thousand, eight hundred ninety-three".