22047829921 has 8 divisors (see below), whose sum is σ = 23961651560. Its totient is φ = 20165127552.

The previous prime is 22047829883. The next prime is 22047829931. The reversal of 22047829921 is 12992874022.

It can be written as a sum of positive squares in 4 ways, for example, as 2193610896 + 19854219025 = 46836^2 + 140905^2 .

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-22047829921 is a prime.

It is a super-2 number, since 2×22047829921² (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 (22047829931) 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, 7778340 + ... + 7781173.

It is an arithmetic number, because the mean of its divisors is an integer number (2995206445).

Almost surely, 2^22047829921 is an apocalyptic number.

It is an amenable number.

22047829921 is a deficient number, since it is larger than the sum of its proper divisors (1913821639).

22047829921 is a wasteful number, since it uses less digits than its factorization.

22047829921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15559635.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 22047829921 in words is "twenty-two billion, forty-seven million, eight hundred twenty-nine thousand, nine hundred twenty-one".