2102020073 has 2 divisors, whose sum is σ = 2102020074. Its totient is φ = 2102020072.

The previous prime is 2102020003. The next prime is 2102020147. The reversal of 2102020073 is 3700202012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1803870784 + 298149289 = 42472^2 + 17267^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102020073 - 2¹⁴ = 2102003689 is a prime.

It is not a weakly prime, because it can be changed into another prime (2102020003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051010036 + 1051010037.

It is an arithmetic number, because the mean of its divisors is an integer number (1051010037).

Almost surely, 2^2102020073 is an apocalyptic number.

It is an amenable number.

2102020073 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102020073 is an equidigital number, since it uses as much as digits as its factorization.

2102020073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 2102020073 is about 45847.7924550354. The cubic root of 2102020073 is about 1280.9896466335.

Adding to 2102020073 its reverse (3700202012), we get a palindrome (5802222085).

The spelling of 2102020073 in words is "two billion, one hundred two million, twenty thousand, seventy-three".