21999999993019 has 2 divisors, whose sum is σ = 21999999993020. Its totient is φ = 21999999993018.

The previous prime is 21999999993011. The next prime is 21999999993029. The reversal of 21999999993019 is 91039999999912.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21999999993019 - 2³ = 21999999993011 is a prime.

It is a super-2 number, since 2×21999999993019² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21999999993011) 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, 10999999996509 + 10999999996510.

It is an arithmetic number, because the mean of its divisors is an integer number (10999999996510).

Almost surely, 2^{21999999993019} is an apocalyptic number.

21999999993019 is a deficient number, since it is larger than the sum of its proper divisors (1).

21999999993019 is an equidigital number, since it uses as much as digits as its factorization.

21999999993019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2324522934, while the sum is 88.

The spelling of 21999999993019 in words is "twenty-one trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-three thousand, nineteen".