20194175526849 has 27 divisors (see below), whose sum is σ = 29463016285027. Its totient is φ = 13328590038000.

The previous prime is 20194175526829. The next prime is 20194175526853. The reversal of 20194175526849 is 94862557149102.

The square root of 20194175526849 is 4493793.

It is a perfect power (a square), and thus also a powerful number.

20194175526849 is a `hidden beast` number, since 2 + 0 + 1 + 9 + 4 + 17 + 552 + 68 + 4 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19402324707249 + 791850819600 = 4404807^2 + 889860^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20194175526849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20194175526829) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1361611864 + ... + 1361626694.

Almost surely, 2^{20194175526849} is an apocalyptic number.

20194175526849 is the 4493793-rd square number.

20194175526849 is the 2246897-th centered octagonal number.

It is an amenable number.

20194175526849 is a deficient number, since it is larger than the sum of its proper divisors (9268840758178).

20194175526849 is an frugal number, since it uses more digits than its factorization.

20194175526849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29870 (or 14935 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 63.

The spelling of 20194175526849 in words is "twenty trillion, one hundred ninety-four billion, one hundred seventy-five million, five hundred twenty-six thousand, eight hundred forty-nine".