18072793 has 2 divisors, whose sum is σ = 18072794. Its totient is φ = 18072792.

The previous prime is 18072787. The next prime is 18072797. The reversal of 18072793 is 39727081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17372224 + 700569 = 4168^2 + 837^2 .

It is a cyclic number.

It is not a de Polignac number, because 18072793 - 2⁹ = 18072281 is a prime.

It is not a weakly prime, because it can be changed into another prime (18072797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9036396 + 9036397.

It is an arithmetic number, because the mean of its divisors is an integer number (9036397).

Almost surely, 2^18072793 is an apocalyptic number.

It is an amenable number.

18072793 is a deficient number, since it is larger than the sum of its proper divisors (1).

18072793 is an equidigital number, since it uses as much as digits as its factorization.

18072793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 18072793 is about 4251.2107687105. The cubic root of 18072793 is about 262.4269450521.

The spelling of 18072793 in words is "eighteen million, seventy-two thousand, seven hundred ninety-three".