220120001993 has 2 divisors, whose sum is σ = 220120001994. Its totient is φ = 220120001992.

The previous prime is 220120001977. The next prime is 220120002023. The reversal of 220120001993 is 399100021022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219410738569 + 709263424 = 468413^2 + 26632^2 .

It is a cyclic number.

It is not a de Polignac number, because 220120001993 - 2⁴ = 220120001977 is a prime.

It is not a weakly prime, because it can be changed into another prime (220120001903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110060000996 + 110060000997.

It is an arithmetic number, because the mean of its divisors is an integer number (110060000997).

Almost surely, 2^220120001993 is an apocalyptic number.

It is an amenable number.

220120001993 is a deficient number, since it is larger than the sum of its proper divisors (1).

220120001993 is an equidigital number, since it uses as much as digits as its factorization.

220120001993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The spelling of 220120001993 in words is "two hundred twenty billion, one hundred twenty million, one thousand, nine hundred ninety-three".