20173585429 has 8 divisors (see below), whose sum is σ = 20710471320. Its totient is φ = 19638835200.

The previous prime is 20173585427. The next prime is 20173585457. The reversal of 20173585429 is 92458537102.

It can be written as a sum of positive squares in 4 ways, for example, as 161239204 + 20012346225 = 12698^2 + 141465^2 .

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 20173585429 - 2¹ = 20173585427 is a prime.

It is a super-2 number, since 2×20173585429² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20173585423) 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, 514764 + ... + 552565.

It is an arithmetic number, because the mean of its divisors is an integer number (2588808915).

Almost surely, 2^20173585429 is an apocalyptic number.

It is an amenable number.

20173585429 is a deficient number, since it is larger than the sum of its proper divisors (536885891).

20173585429 is a wasteful number, since it uses less digits than its factorization.

20173585429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067831.

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 20173585429 in words is "twenty billion, one hundred seventy-three million, five hundred eighty-five thousand, four hundred twenty-nine".