20969045827 has 2 divisors, whose sum is σ = 20969045828. Its totient is φ = 20969045826.

The previous prime is 20969045821. The next prime is 20969045831. The reversal of 20969045827 is 72854096902.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20969045827 is a prime.

It is a super-2 number, since 2×20969045827² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20969045821) 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, 10484522913 + 10484522914.

It is an arithmetic number, because the mean of its divisors is an integer number (10484522914).

Almost surely, 2^20969045827 is an apocalyptic number.

20969045827 is a deficient number, since it is larger than the sum of its proper divisors (1).

20969045827 is an equidigital number, since it uses as much as digits as its factorization.

20969045827 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 20969045827 in words is "twenty billion, nine hundred sixty-nine million, forty-five thousand, eight hundred twenty-seven".