21272845179 has 8 divisors (see below), whose sum is σ = 28527746832. Its totient is φ = 14099920160.

The previous prime is 21272845163. The next prime is 21272845213. The reversal of 21272845179 is 97154827212.

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 21272845179 - 2⁴ = 21272845163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21272845109) 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, 20493552 + ... + 20494589.

It is an arithmetic number, because the mean of its divisors is an integer number (3565968354).

Almost surely, 2^21272845179 is an apocalyptic number.

21272845179 is a deficient number, since it is larger than the sum of its proper divisors (7254901653).

21272845179 is a wasteful number, since it uses less digits than its factorization.

21272845179 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40988317.

The product of its digits is 564480, while the sum is 48.

The spelling of 21272845179 in words is "twenty-one billion, two hundred seventy-two million, eight hundred forty-five thousand, one hundred seventy-nine".