2073216421 has 2 divisors, whose sum is σ = 2073216422. Its totient is φ = 2073216420.

The previous prime is 2073216403. The next prime is 2073216437. The reversal of 2073216421 is 1246123702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1338535396 + 734681025 = 36586^2 + 27105^2 .

It is a cyclic number.

It is not a de Polignac number, because 2073216421 - 2²⁹ = 1536345509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2073216421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2073216121) 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, 1036608210 + 1036608211.

It is an arithmetic number, because the mean of its divisors is an integer number (1036608211).

Almost surely, 2^2073216421 is an apocalyptic number.

It is an amenable number.

2073216421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2073216421 is an equidigital number, since it uses as much as digits as its factorization.

2073216421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 2073216421 is about 45532.5863640536. The cubic root of 2073216421 is about 1275.1116490207. Note that the first 3 decimals are identical.

The spelling of 2073216421 in words is "two billion, seventy-three million, two hundred sixteen thousand, four hundred twenty-one".