21888673799 has 16 divisors (see below), whose sum is σ = 23374332000. Its totient is φ = 20425534464.

The previous prime is 21888673753. The next prime is 21888673811. The reversal of 21888673799 is 99737688812.

It is a cyclic number.

It is not a de Polignac number, because 21888673799 - 2¹⁶ = 21888608263 is a prime.

It is a super-2 number, since 2×21888673799² (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 (21888673399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1433684 + ... + 1448870.

It is an arithmetic number, because the mean of its divisors is an integer number (1460895750).

Almost surely, 2^21888673799 is an apocalyptic number.

21888673799 is a deficient number, since it is larger than the sum of its proper divisors (1485658201).

21888673799 is a wasteful number, since it uses less digits than its factorization.

21888673799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15922.

The product of its digits is 73156608, while the sum is 68.

The spelling of 21888673799 in words is "twenty-one billion, eight hundred eighty-eight million, six hundred seventy-three thousand, seven hundred ninety-nine".