21884971719 has 16 divisors (see below), whose sum is σ = 31584101472. Its totient is φ = 13399306368.

The previous prime is 21884971697. The next prime is 21884971727. The reversal of 21884971719 is 91717948812.

It is not a de Polignac number, because 21884971719 - 2³³ = 13295037127 is a prime.

It is a super-2 number, since 2×21884971719² (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 (21884971739) 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, 1416564 + ... + 1431929.

It is an arithmetic number, because the mean of its divisors is an integer number (1974006342).

Almost surely, 2^21884971719 is an apocalyptic number.

21884971719 is a deficient number, since it is larger than the sum of its proper divisors (9699129753).

21884971719 is a wasteful number, since it uses less digits than its factorization.

21884971719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2848706.

The product of its digits is 2032128, while the sum is 57.

The spelling of 21884971719 in words is "twenty-one billion, eight hundred eighty-four million, nine hundred seventy-one thousand, seven hundred nineteen".