20100305569 has 2 divisors, whose sum is σ = 20100305570. Its totient is φ = 20100305568.

The previous prime is 20100305551. The next prime is 20100305579. The reversal of 20100305569 is 96550300102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17778222225 + 2322083344 = 133335^2 + 48188^2 .

It is a cyclic number.

It is not a de Polignac number, because 20100305569 - 2³¹ = 17952821921 is a prime.

It is a super-2 number, since 2×20100305569² (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 20100305569.

It is not a weakly prime, because it can be changed into another prime (20100305509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050152784 + 10050152785.

It is an arithmetic number, because the mean of its divisors is an integer number (10050152785).

Almost surely, 2^20100305569 is an apocalyptic number.

It is an amenable number.

20100305569 is a deficient number, since it is larger than the sum of its proper divisors (1).

20100305569 is an equidigital number, since it uses as much as digits as its factorization.

20100305569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 31.

The spelling of 20100305569 in words is "twenty billion, one hundred million, three hundred five thousand, five hundred sixty-nine".