20651192819 has 2 divisors, whose sum is σ = 20651192820. Its totient is φ = 20651192818.

The previous prime is 20651192773. The next prime is 20651192843. The reversal of 20651192819 is 91829115602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20651192819 - 2²⁸ = 20382757363 is a prime.

It is a super-2 number, since 2×20651192819² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20651192819.

It is not a weakly prime, because it can be changed into another prime (20651195819) 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 as a sum of consecutive naturals, namely, 10325596409 + 10325596410.

It is an arithmetic number, because the mean of its divisors is an integer number (10325596410).

Almost surely, 2^20651192819 is an apocalyptic number.

20651192819 is a deficient number, since it is larger than the sum of its proper divisors (1).

20651192819 is an equidigital number, since it uses as much as digits as its factorization.

20651192819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 44.

The spelling of 20651192819 in words is "twenty billion, six hundred fifty-one million, one hundred ninety-two thousand, eight hundred nineteen".