21672141369 has 8 divisors (see below), whose sum is σ = 29080241280. Its totient is φ = 14356067856.

The previous prime is 21672141353. The next prime is 21672141383. The reversal of 21672141369 is 96314127612.

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

It is not a de Polignac number, because 21672141369 - 2⁴ = 21672141353 is a prime.

It is a super-2 number, since 2×21672141369² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 21672141369.

It is not an unprimeable number, because it can be changed into a prime (21672141319) 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, 23006049 + ... + 23006990.

It is an arithmetic number, because the mean of its divisors is an integer number (3635030160).

Almost surely, 2^21672141369 is an apocalyptic number.

It is an amenable number.

21672141369 is a deficient number, since it is larger than the sum of its proper divisors (7408099911).

21672141369 is a wasteful number, since it uses less digits than its factorization.

21672141369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46013199.

The product of its digits is 108864, while the sum is 42.

The spelling of 21672141369 in words is "twenty-one billion, six hundred seventy-two million, one hundred forty-one thousand, three hundred sixty-nine".