18202001969 has 2 divisors, whose sum is σ = 18202001970. Its totient is φ = 18202001968.

The previous prime is 18202001959. The next prime is 18202001971. The reversal of 18202001969 is 96910020281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16715128369 + 1486873600 = 129287^2 + 38560^2 .

It is an emirp because it is prime and its reverse (96910020281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18202001969 - 2¹⁶ = 18201936433 is a prime.

It is a super-2 number, since 2×18202001969² (a number of 21 digits) contains 22 as substring.

Together with 18202001971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18202001929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9101000984 + 9101000985.

It is an arithmetic number, because the mean of its divisors is an integer number (9101000985).

Almost surely, 2^18202001969 is an apocalyptic number.

It is an amenable number.

18202001969 is a deficient number, since it is larger than the sum of its proper divisors (1).

18202001969 is an equidigital number, since it uses as much as digits as its factorization.

18202001969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 38.

The spelling of 18202001969 in words is "eighteen billion, two hundred two million, one thousand, nine hundred sixty-nine".