20170830845 has 8 divisors (see below), whose sum is σ = 26405451360. Its totient is φ = 14669695120.

The previous prime is 20170830833. The next prime is 20170830857. The reversal of 20170830845 is 54803807102.

It is an interprime number because it is at equal distance from previous prime (20170830833) and next prime (20170830857).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20170830845 - 2¹² = 20170826749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20170830799 and 20170830808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183371135 + ... + 183371244.

It is an arithmetic number, because the mean of its divisors is an integer number (3300681420).

Almost surely, 2^20170830845 is an apocalyptic number.

It is an amenable number.

20170830845 is a deficient number, since it is larger than the sum of its proper divisors (6234620515).

20170830845 is a wasteful number, since it uses less digits than its factorization.

20170830845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366742395.

The product of its (nonzero) digits is 53760, while the sum is 38.

The spelling of 20170830845 in words is "twenty billion, one hundred seventy million, eight hundred thirty thousand, eight hundred forty-five".