18536773 has 2 divisors, whose sum is σ = 18536774. Its totient is φ = 18536772.

The previous prime is 18536767. The next prime is 18536779. The reversal of 18536773 is 37763581.

It is a balanced prime because it is at equal distance from previous prime (18536767) and next prime (18536779).

It can be written as a sum of positive squares in only one way, i.e., 18378369 + 158404 = 4287^2 + 398^2 .

It is an emirp because it is prime and its reverse (37763581) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18536773 - 2⁹ = 18536261 is a prime.

It is a super-2 number, since 2×18536773² = 687223906507058, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18536779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9268386 + 9268387.

It is an arithmetic number, because the mean of its divisors is an integer number (9268387).

Almost surely, 2^18536773 is an apocalyptic number.

It is an amenable number.

18536773 is a deficient number, since it is larger than the sum of its proper divisors (1).

18536773 is an equidigital number, since it uses as much as digits as its factorization.

18536773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 40.

The square root of 18536773 is about 4305.4352857754. The cubic root of 18536773 is about 264.6537449956.

The spelling of 18536773 in words is "eighteen million, five hundred thirty-six thousand, seven hundred seventy-three".