21907273019 has 2 divisors, whose sum is σ = 21907273020. Its totient is φ = 21907273018.

The previous prime is 21907273007. The next prime is 21907273027. The reversal of 21907273019 is 91037270912.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21907273019 - 2⁸ = 21907272763 is a prime.

It is a super-2 number, since 2×21907273019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21907273039) 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, 10953636509 + 10953636510.

It is an arithmetic number, because the mean of its divisors is an integer number (10953636510).

Almost surely, 2^21907273019 is an apocalyptic number.

21907273019 is a deficient number, since it is larger than the sum of its proper divisors (1).

21907273019 is an equidigital number, since it uses as much as digits as its factorization.

21907273019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47628, while the sum is 41.

The spelling of 21907273019 in words is "twenty-one billion, nine hundred seven million, two hundred seventy-three thousand, nineteen".