18262021901 has 2 divisors, whose sum is σ = 18262021902. Its totient is φ = 18262021900.

The previous prime is 18262021837. The next prime is 18262021909. The reversal of 18262021901 is 10912026281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14105125225 + 4156896676 = 118765^2 + 64474^2 .

It is a cyclic number.

It is not a de Polignac number, because 18262021901 - 2⁶ = 18262021837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18262021909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9131010950 + 9131010951.

It is an arithmetic number, because the mean of its divisors is an integer number (9131010951).

Almost surely, 2^18262021901 is an apocalyptic number.

It is an amenable number.

18262021901 is a deficient number, since it is larger than the sum of its proper divisors (1).

18262021901 is an equidigital number, since it uses as much as digits as its factorization.

18262021901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 32.

The spelling of 18262021901 in words is "eighteen billion, two hundred sixty-two million, twenty-one thousand, nine hundred one".