18362020249 has 2 divisors, whose sum is σ = 18362020250. Its totient is φ = 18362020248.

The previous prime is 18362020247. The next prime is 18362020267. The reversal of 18362020249 is 94202026381.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12986197849 + 5375822400 = 113957^2 + 73320^2 .

It is a cyclic number.

It is not a de Polignac number, because 18362020249 - 2¹ = 18362020247 is a prime.

Together with 18362020247, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18362020241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9181010124 + 9181010125.

It is an arithmetic number, because the mean of its divisors is an integer number (9181010125).

Almost surely, 2^18362020249 is an apocalyptic number.

It is an amenable number.

18362020249 is a deficient number, since it is larger than the sum of its proper divisors (1).

18362020249 is an equidigital number, since it uses as much as digits as its factorization.

18362020249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 18362020249 in words is "eighteen billion, three hundred sixty-two million, twenty thousand, two hundred forty-nine".