18499373 has 2 divisors, whose sum is σ = 18499374. Its totient is φ = 18499372.

The previous prime is 18499367. The next prime is 18499379. The reversal of 18499373 is 37399481.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (18499367) and next prime (18499379).

It can be written as a sum of positive squares in only one way, i.e., 18472804 + 26569 = 4298^2 + 163^2 .

It is a cyclic number.

It is not a de Polignac number, because 18499373 - 2⁴ = 18499357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18499379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9249686 + 9249687.

It is an arithmetic number, because the mean of its divisors is an integer number (9249687).

Almost surely, 2^18499373 is an apocalyptic number.

It is an amenable number.

18499373 is a deficient number, since it is larger than the sum of its proper divisors (1).

18499373 is an equidigital number, since it uses as much as digits as its factorization.

18499373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 44.

The square root of 18499373 is about 4301.0897456342. The cubic root of 18499373 is about 264.4756357073.

The spelling of 18499373 in words is "eighteen million, four hundred ninety-nine thousand, three hundred seventy-three".