21311946017219 has 18 divisors (see below), whose sum is σ = 25175616224148. Its totient is φ = 17883983473200.

The previous prime is 21311946017177. The next prime is 21311946017249. The reversal of 21311946017219 is 91271064911312.

It is not a de Polignac number, because 21311946017219 - 2²⁴ = 21311929240003 is a prime.

It is a super-2 number, since 2×21311946017219² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21311946017249) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 198991454 + ... + 199098524.

It is an arithmetic number, because the mean of its divisors is an integer number (1398645345786).

Almost surely, 2^{21311946017219} is an apocalyptic number.

21311946017219 is a deficient number, since it is larger than the sum of its proper divisors (3863670206929).

21311946017219 is an frugal number, since it uses more digits than its factorization.

21311946017219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214179 (or 107095 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 47.

The spelling of 21311946017219 in words is "twenty-one trillion, three hundred eleven billion, nine hundred forty-six million, seventeen thousand, two hundred nineteen".