1818274573 has 2 divisors, whose sum is σ = 1818274574. Its totient is φ = 1818274572.

The previous prime is 1818274529. The next prime is 1818274613. The reversal of 1818274573 is 3754728181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 993321289 + 824953284 = 31517^2 + 28722^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1818274573 is a prime.

It is a super-2 number, since 2×1818274573² = 6612244845636664658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1818244573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 909137286 + 909137287.

It is an arithmetic number, because the mean of its divisors is an integer number (909137287).

Almost surely, 2^1818274573 is an apocalyptic number.

It is an amenable number.

1818274573 is a deficient number, since it is larger than the sum of its proper divisors (1).

1818274573 is an equidigital number, since it uses as much as digits as its factorization.

1818274573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 376320, while the sum is 46.

The square root of 1818274573 is about 42641.2309039033. The cubic root of 1818274573 is about 1220.5431991625.

The spelling of 1818274573 in words is "one billion, eight hundred eighteen million, two hundred seventy-four thousand, five hundred seventy-three".