21919113629 has 8 divisors (see below), whose sum is σ = 25060876800. Its totient is φ = 18779965776.

The previous prime is 21919113563. The next prime is 21919113631. The reversal of 21919113629 is 92631191912.

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 21919113629 - 2²⁰ = 21918065053 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21919113629.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21919113679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 635834 + ... + 669419.

It is an arithmetic number, because the mean of its divisors is an integer number (3132609600).

Almost surely, 2^21919113629 is an apocalyptic number.

It is an amenable number.

21919113629 is a deficient number, since it is larger than the sum of its proper divisors (3141763171).

21919113629 is a wasteful number, since it uses less digits than its factorization.

21919113629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1307659.

The product of its digits is 52488, while the sum is 44.

The spelling of 21919113629 in words is "twenty-one billion, nine hundred nineteen million, one hundred thirteen thousand, six hundred twenty-nine".