18002436797 has 2 divisors, whose sum is σ = 18002436798. Its totient is φ = 18002436796.

The previous prime is 18002436763. The next prime is 18002436799. The reversal of 18002436797 is 79763420081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16687214041 + 1315222756 = 129179^2 + 36266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18002436797 is a prime.

Together with 18002436799, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18002436799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9001218398 + 9001218399.

It is an arithmetic number, because the mean of its divisors is an integer number (9001218399).

Almost surely, 2^18002436797 is an apocalyptic number.

It is an amenable number.

18002436797 is a deficient number, since it is larger than the sum of its proper divisors (1).

18002436797 is an equidigital number, since it uses as much as digits as its factorization.

18002436797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 47.

The spelling of 18002436797 in words is "eighteen billion, two million, four hundred thirty-six thousand, seven hundred ninety-seven".