1820020010993 has 2 divisors, whose sum is σ = 1820020010994. Its totient is φ = 1820020010992.

The previous prime is 1820020010989. The next prime is 1820020011011. The reversal of 1820020010993 is 3990100200281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1539356341264 + 280663669729 = 1240708^2 + 529777^2 .

It is a cyclic number.

It is not a de Polignac number, because 1820020010993 - 2² = 1820020010989 is a prime.

It is not a weakly prime, because it can be changed into another prime (1820020010593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 910010005496 + 910010005497.

It is an arithmetic number, because the mean of its divisors is an integer number (910010005497).

Almost surely, 2^{1820020010993} is an apocalyptic number.

It is an amenable number.

1820020010993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1820020010993 is an equidigital number, since it uses as much as digits as its factorization.

1820020010993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 1820020010993 in words is "one trillion, eight hundred twenty billion, twenty million, ten thousand, nine hundred ninety-three".