20172583873 has 8 divisors (see below), whose sum is σ = 21726606888. Its totient is φ = 18618887424.

The previous prime is 20172583867. The next prime is 20172583897. The reversal of 20172583873 is 37838527102.

It can be written as a sum of positive squares in 4 ways, for example, as 8598481984 + 11574101889 = 92728^2 + 107583^2 .

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-20172583873 is a prime.

It is a super-2 number, since 2×20172583873² (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 (20172583813) 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, 55161 + ... + 208297.

It is an arithmetic number, because the mean of its divisors is an integer number (2715825861).

Almost surely, 2^20172583873 is an apocalyptic number.

It is an amenable number.

20172583873 is a deficient number, since it is larger than the sum of its proper divisors (1554023015).

20172583873 is a wasteful number, since it uses less digits than its factorization.

20172583873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163283.

The product of its (nonzero) digits is 564480, while the sum is 46.

The spelling of 20172583873 in words is "twenty billion, one hundred seventy-two million, five hundred eighty-three thousand, eight hundred seventy-three".