20001011969 has 2 divisors, whose sum is σ = 20001011970. Its totient is φ = 20001011968.

The previous prime is 20001011957. The next prime is 20001012019. The reversal of 20001011969 is 96911010002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18642352369 + 1358659600 = 136537^2 + 36860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20001011969 is a prime.

It is a super-2 number, since 2×20001011969² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20001011939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000505984 + 10000505985.

It is an arithmetic number, because the mean of its divisors is an integer number (10000505985).

Almost surely, 2^20001011969 is an apocalyptic number.

It is an amenable number.

20001011969 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001011969 is an equidigital number, since it uses as much as digits as its factorization.

20001011969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 29.

The spelling of 20001011969 in words is "twenty billion, one million, eleven thousand, nine hundred sixty-nine".