20663098191 has 16 divisors (see below), whose sum is σ = 30631087200. Its totient is φ = 13766808384.

The previous prime is 20663098187. The next prime is 20663098193. The reversal of 20663098191 is 19189036602.

It is a happy number.

20663098191 is a `hidden beast` number, since 2 + 0 + 6 + 630 + 9 + 8 + 1 + 9 + 1 = 666.

It is not a de Polignac number, because 20663098191 - 2² = 20663098187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20663098193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194376 + ... + 281261.

It is an arithmetic number, because the mean of its divisors is an integer number (1914442950).

Almost surely, 2^20663098191 is an apocalyptic number.

20663098191 is a deficient number, since it is larger than the sum of its proper divisors (9967989009).

20663098191 is a wasteful number, since it uses less digits than its factorization.

20663098191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477255 (or 477249 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The spelling of 20663098191 in words is "twenty billion, six hundred sixty-three million, ninety-eight thousand, one hundred ninety-one".