20444896197 has 12 divisors (see below), whose sum is σ = 32216200224. Its totient is φ = 12390846120.

The previous prime is 20444896187. The next prime is 20444896223. The reversal of 20444896197 is 79169844402.

20444896197 is a `hidden beast` number, since 2 + 0 + 4 + 448 + 9 + 6 + 197 = 666.

It is not a de Polignac number, because 20444896197 - 2⁴ = 20444896181 is a prime.

It is a super-2 number, since 2×20444896197² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20444896187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103256953 + ... + 103257150.

It is an arithmetic number, because the mean of its divisors is an integer number (2684683352).

Almost surely, 2^20444896197 is an apocalyptic number.

It is an amenable number.

20444896197 is a deficient number, since it is larger than the sum of its proper divisors (11771304027).

20444896197 is a wasteful number, since it uses less digits than its factorization.

20444896197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206514120 (or 206514117 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 20444896197 in words is "twenty billion, four hundred forty-four million, eight hundred ninety-six thousand, one hundred ninety-seven".