20849286198 has 64 divisors (see below), whose sum is σ = 45939382272. Its totient is φ = 6268026240.

The previous prime is 20849286179. The next prime is 20849286209. The reversal of 20849286198 is 89168294802.

It is a super-2 number, since 2×20849286198² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2308740 + ... + 2317752.

It is an arithmetic number, because the mean of its divisors is an integer number (717802848).

Almost surely, 2^20849286198 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20849286198, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22969691136).

20849286198 is an abundant number, since it is smaller than the sum of its proper divisors (25090096074).

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

20849286198 is a wasteful number, since it uses less digits than its factorization.

20849286198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9709.

The product of its (nonzero) digits is 3981312, while the sum is 57.

The spelling of 20849286198 in words is "twenty billion, eight hundred forty-nine million, two hundred eighty-six thousand, one hundred ninety-eight".