17220943129 has 4 divisors (see below), whose sum is σ = 18545631076. Its totient is φ = 15896255184.

The previous prime is 17220943109. The next prime is 17220943133. The reversal of 17220943129 is 92134902271.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5277731904 + 11943211225 = 72648^2 + 109285^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17220943129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 17220943091 and 17220943100.

It is not an unprimeable number, because it can be changed into a prime (17220943109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 662343954 + ... + 662343979.

It is an arithmetic number, because the mean of its divisors is an integer number (4636407769).

Almost surely, 2^17220943129 is an apocalyptic number.

It is an amenable number.

17220943129 is a deficient number, since it is larger than the sum of its proper divisors (1324687947).

17220943129 is a wasteful number, since it uses less digits than its factorization.

17220943129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324687946.

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 17220943129 in words is "seventeen billion, two hundred twenty million, nine hundred forty-three thousand, one hundred twenty-nine".