21719446233 has 8 divisors (see below), whose sum is σ = 28971557568. Its totient is φ = 14473482864.

The previous prime is 21719446223. The next prime is 21719446237. The reversal of 21719446233 is 33264491712.

It is a happy number.

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

It is not a de Polignac number, because 21719446233 - 2¹⁸ = 21719184089 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (21719446237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1528741 + ... + 1542882.

It is an arithmetic number, because the mean of its divisors is an integer number (3621444696).

Almost surely, 2^21719446233 is an apocalyptic number.

It is an amenable number.

21719446233 is a deficient number, since it is larger than the sum of its proper divisors (7252111335).

21719446233 is a wasteful number, since it uses less digits than its factorization.

21719446233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3073983.

The product of its digits is 217728, while the sum is 42.

The spelling of 21719446233 in words is "twenty-one billion, seven hundred nineteen million, four hundred forty-six thousand, two hundred thirty-three".