21983603919 has 8 divisors (see below), whose sum is σ = 29336942592. Its totient is φ = 14643000600.

The previous prime is 21983603911. The next prime is 21983603921. The reversal of 21983603919 is 91930638912.

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 21983603919 - 2³ = 21983603911 is a prime.

It is a super-2 number, since 2×21983603919² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21983603911) 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, 3179809 + ... + 3186714.

It is an arithmetic number, because the mean of its divisors is an integer number (3667117824).

Almost surely, 2^21983603919 is an apocalyptic number.

21983603919 is a deficient number, since it is larger than the sum of its proper divisors (7353338673).

21983603919 is a wasteful number, since it uses less digits than its factorization.

21983603919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6367677.

The product of its (nonzero) digits is 629856, while the sum is 51.

The spelling of 21983603919 in words is "twenty-one billion, nine hundred eighty-three million, six hundred three thousand, nine hundred nineteen".