21290179219 has 8 divisors (see below), whose sum is σ = 22026216960. Its totient is φ = 20554267776.

The previous prime is 21290179111. The next prime is 21290179247. The reversal of 21290179219 is 91297109212.

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-21290179219 is a prime.

It is a super-2 number, since 2×21290179219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21290179249) 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, 422062 + ... + 469804.

It is an arithmetic number, because the mean of its divisors is an integer number (2753277120).

Almost surely, 2^21290179219 is an apocalyptic number.

21290179219 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

21290179219 is a deficient number, since it is larger than the sum of its proper divisors (736037741).

21290179219 is a wasteful number, since it uses less digits than its factorization.

21290179219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63149.

The product of its (nonzero) digits is 40824, while the sum is 43.

The spelling of 21290179219 in words is "twenty-one billion, two hundred ninety million, one hundred seventy-nine thousand, two hundred nineteen".