21950389296019 has 2 divisors, whose sum is σ = 21950389296020. Its totient is φ = 21950389296018.

The previous prime is 21950389296007. The next prime is 21950389296113. The reversal of 21950389296019 is 91069298305912.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21950389296019 is a prime.

It is a super-2 number, since 2×21950389296019² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21950389266019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10975194648009 + 10975194648010.

It is an arithmetic number, because the mean of its divisors is an integer number (10975194648010).

Almost surely, 2^{21950389296019} is an apocalyptic number.

21950389296019 is a deficient number, since it is larger than the sum of its proper divisors (1).

21950389296019 is an equidigital number, since it uses as much as digits as its factorization.

21950389296019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18895680, while the sum is 64.

The spelling of 21950389296019 in words is "twenty-one trillion, nine hundred fifty billion, three hundred eighty-nine million, two hundred ninety-six thousand, nineteen".