21897699119 has 8 divisors (see below), whose sum is σ = 21925940400. Its totient is φ = 21869479296.

The previous prime is 21897699091. The next prime is 21897699127. The reversal of 21897699119 is 91199679812.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21897699119 is a prime.

It is a super-2 number, since 2×21897699119² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21897699319) 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, 3015497 + ... + 3022749.

It is an arithmetic number, because the mean of its divisors is an integer number (2740742550).

Almost surely, 2^21897699119 is an apocalyptic number.

21897699119 is a deficient number, since it is larger than the sum of its proper divisors (28241281).

21897699119 is a wasteful number, since it uses less digits than its factorization.

21897699119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10729.

The product of its digits is 4408992, while the sum is 62.

The spelling of 21897699119 in words is "twenty-one billion, eight hundred ninety-seven million, six hundred ninety-nine thousand, one hundred nineteen".