21246183337 has 2 divisors, whose sum is σ = 21246183338. Its totient is φ = 21246183336.

The previous prime is 21246183331. The next prime is 21246183383. The reversal of 21246183337 is 73338164212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19466946576 + 1779236761 = 139524^2 + 42181^2 .

It is a cyclic number.

It is not a de Polignac number, because 21246183337 - 2³¹ = 19098699689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21246183337.

It is not a weakly prime, because it can be changed into another prime (21246183331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10623091668 + 10623091669.

It is an arithmetic number, because the mean of its divisors is an integer number (10623091669).

Almost surely, 2^21246183337 is an apocalyptic number.

It is an amenable number.

21246183337 is a deficient number, since it is larger than the sum of its proper divisors (1).

21246183337 is an equidigital number, since it uses as much as digits as its factorization.

21246183337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 40.

The spelling of 21246183337 in words is "twenty-one billion, two hundred forty-six million, one hundred eighty-three thousand, three hundred thirty-seven".