20819189627 has 2 divisors, whose sum is σ = 20819189628. Its totient is φ = 20819189626.

The previous prime is 20819189597. The next prime is 20819189641. The reversal of 20819189627 is 72698191802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20819189627 - 2¹⁰ = 20819188603 is a prime.

It is not a weakly prime, because it can be changed into another prime (20819189527) 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 as a sum of consecutive naturals, namely, 10409594813 + 10409594814.

It is an arithmetic number, because the mean of its divisors is an integer number (10409594814).

Almost surely, 2^20819189627 is an apocalyptic number.

20819189627 is a deficient number, since it is larger than the sum of its proper divisors (1).

20819189627 is an equidigital number, since it uses as much as digits as its factorization.

20819189627 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 53.

The spelling of 20819189627 in words is "twenty billion, eight hundred nineteen million, one hundred eighty-nine thousand, six hundred twenty-seven".