20170944850 has 24 divisors (see below), whose sum is σ = 42877666368. Its totient is φ = 6915752400.

The previous prime is 20170944811. The next prime is 20170944853. The reversal of 20170944850 is 5844907102.

It is a super-2 number, since 2×20170944850² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20170944853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28815286 + ... + 28815985.

It is an arithmetic number, because the mean of its divisors is an integer number (1786569432).

Almost surely, 2^20170944850 is an apocalyptic number.

20170944850 is an abundant number, since it is smaller than the sum of its proper divisors (22706721518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20170944850 is a wasteful number, since it uses less digits than its factorization.

20170944850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57631290 (or 57631285 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 20170944850 in words is "twenty billion, one hundred seventy million, nine hundred forty-four thousand, eight hundred fifty".