20651192811 has 16 divisors (see below), whose sum is σ = 30597733920. Its totient is φ = 13765943520.

The previous prime is 20651192773. The next prime is 20651192819. The reversal of 20651192811 is 11829115602.

It is not a de Polignac number, because 20651192811 - 2⁹ = 20651192299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20651192819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241981 + ... + 316001.

It is an arithmetic number, because the mean of its divisors is an integer number (1912358370).

Almost surely, 2^20651192811 is an apocalyptic number.

20651192811 is a deficient number, since it is larger than the sum of its proper divisors (9946541109).

20651192811 is a wasteful number, since it uses less digits than its factorization.

20651192811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84363 (or 84357 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 36.

The spelling of 20651192811 in words is "twenty billion, six hundred fifty-one million, one hundred ninety-two thousand, eight hundred eleven".