1818996731 has 2 divisors, whose sum is σ = 1818996732. Its totient is φ = 1818996730.

The previous prime is 1818996691. The next prime is 1818996757. The reversal of 1818996731 is 1376998181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1818996731 - 2¹⁰ = 1818995707 is a prime.

It is a super-2 number, since 2×1818996731² = 6617498214777372722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1818996761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 909498365 + 909498366.

It is an arithmetic number, because the mean of its divisors is an integer number (909498366).

Almost surely, 2^1818996731 is an apocalyptic number.

1818996731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1818996731 is an equidigital number, since it uses as much as digits as its factorization.

1818996731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 53.

The square root of 1818996731 is about 42649.6979004541. The cubic root of 1818996731 is about 1220.7047641215.

The spelling of 1818996731 in words is "one billion, eight hundred eighteen million, nine hundred ninety-six thousand, seven hundred thirty-one".