993562520021 has 2 divisors, whose sum is σ = 993562520022. Its totient is φ = 993562520020.

The previous prime is 993562520003. The next prime is 993562520039. The reversal of 993562520021 is 120025265399.

It is a balanced prime because it is at equal distance from previous prime (993562520003) and next prime (993562520039).

It can be written as a sum of positive squares in only one way, i.e., 992155444900 + 1407075121 = 996070^2 + 37511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-993562520021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (993562520521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496781260010 + 496781260011.

It is an arithmetic number, because the mean of its divisors is an integer number (496781260011).

Almost surely, 2^993562520021 is an apocalyptic number.

It is an amenable number.

993562520021 is a deficient number, since it is larger than the sum of its proper divisors (1).

993562520021 is an equidigital number, since it uses as much as digits as its factorization.

993562520021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 44.

The spelling of 993562520021 in words is "nine hundred ninety-three billion, five hundred sixty-two million, five hundred twenty thousand, twenty-one".