18790337 has 2 divisors, whose sum is σ = 18790338. Its totient is φ = 18790336.

The previous prime is 18790313. The next prime is 18790349. The reversal of 18790337 is 73309781.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11397376 + 7392961 = 3376^2 + 2719^2 .

It is an emirp because it is prime and its reverse (73309781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18790337 - 2¹⁰ = 18789313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18790337.

It is not a weakly prime, because it can be changed into another prime (18790357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9395168 + 9395169.

It is an arithmetic number, because the mean of its divisors is an integer number (9395169).

Almost surely, 2^18790337 is an apocalyptic number.

It is an amenable number.

18790337 is a deficient number, since it is larger than the sum of its proper divisors (1).

18790337 is an equidigital number, since it uses as much as digits as its factorization.

18790337 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 18790337 is about 4334.7822321312. The cubic root of 18790337 is about 265.8550145498.

The spelling of 18790337 in words is "eighteen million, seven hundred ninety thousand, three hundred thirty-seven".