220020091969 has 2 divisors, whose sum is σ = 220020091970. Its totient is φ = 220020091968.

The previous prime is 220020091957. The next prime is 220020092009. The reversal of 220020091969 is 969190020022.

It is an a-pointer prime, because the next prime (220020092009) can be obtained adding 220020091969 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219047400625 + 972691344 = 468025^2 + 31188^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220020091969 is a prime.

It is a super-2 number, since 2×220020091969² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (220020091939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110010045984 + 110010045985.

It is an arithmetic number, because the mean of its divisors is an integer number (110010045985).

Almost surely, 2^220020091969 is an apocalyptic number.

It is an amenable number.

220020091969 is a deficient number, since it is larger than the sum of its proper divisors (1).

220020091969 is an equidigital number, since it uses as much as digits as its factorization.

220020091969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 40.

The spelling of 220020091969 in words is "two hundred twenty billion, twenty million, ninety-one thousand, nine hundred sixty-nine".