21442023402191 has 8 divisors (see below), whose sum is σ = 24507258620544. Its totient is φ = 18377310438360.

The previous prime is 21442023402047. The next prime is 21442023402227. The reversal of 21442023402191 is 19120432024412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21442023402191 - 2¹⁸ = 21442023140047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21442023408191) 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 in 7 ways as a sum of consecutive naturals, for example, 130475645 + ... + 130639878.

It is an arithmetic number, because the mean of its divisors is an integer number (3063407327568).

Almost surely, 2^{21442023402191} is an apocalyptic number.

21442023402191 is a deficient number, since it is larger than the sum of its proper divisors (3065235218353).

21442023402191 is a wasteful number, since it uses less digits than its factorization.

21442023402191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261127261.

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 21442023402191 in words is "twenty-one trillion, four hundred forty-two billion, twenty-three million, four hundred two thousand, one hundred ninety-one".