18202256749 has 2 divisors, whose sum is σ = 18202256750. Its totient is φ = 18202256748.

The previous prime is 18202256689. The next prime is 18202256789. The reversal of 18202256749 is 94765220281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10443818025 + 7758438724 = 102195^2 + 88082^2 .

It is an emirp because it is prime and its reverse (94765220281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18202256749 - 2¹⁵ = 18202223981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18202256699 and 18202256708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18202256789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9101128374 + 9101128375.

It is an arithmetic number, because the mean of its divisors is an integer number (9101128375).

Almost surely, 2^18202256749 is an apocalyptic number.

It is an amenable number.

18202256749 is a deficient number, since it is larger than the sum of its proper divisors (1).

18202256749 is an equidigital number, since it uses as much as digits as its factorization.

18202256749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 18202256749 in words is "eighteen billion, two hundred two million, two hundred fifty-six thousand, seven hundred forty-nine".