18300697673 has 2 divisors, whose sum is σ = 18300697674. Its totient is φ = 18300697672.

The previous prime is 18300697643. The next prime is 18300697729. The reversal of 18300697673 is 37679600381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11286300169 + 7014397504 = 106237^2 + 83752^2 .

It is an emirp because it is prime and its reverse (37679600381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18300697673 - 2¹² = 18300693577 is a prime.

It is a super-2 number, since 2×18300697673² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18300697633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9150348836 + 9150348837.

It is an arithmetic number, because the mean of its divisors is an integer number (9150348837).

Almost surely, 2^18300697673 is an apocalyptic number.

It is an amenable number.

18300697673 is a deficient number, since it is larger than the sum of its proper divisors (1).

18300697673 is an equidigital number, since it uses as much as digits as its factorization.

18300697673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1143072, while the sum is 50.

The spelling of 18300697673 in words is "eighteen billion, three hundred million, six hundred ninety-seven thousand, six hundred seventy-three".