20837273 has 2 divisors, whose sum is σ = 20837274. Its totient is φ = 20837272.

The previous prime is 20837261. The next prime is 20837279. The reversal of 20837273 is 37273802.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19642624 + 1194649 = 4432^2 + 1093^2 .

It is a cyclic number.

It is not a de Polignac number, because 20837273 - 2¹⁴ = 20820889 is a prime.

It is not a weakly prime, because it can be changed into another prime (20837279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10418636 + 10418637.

It is an arithmetic number, because the mean of its divisors is an integer number (10418637).

Almost surely, 2^20837273 is an apocalyptic number.

It is an amenable number.

20837273 is a deficient number, since it is larger than the sum of its proper divisors (1).

20837273 is an equidigital number, since it uses as much as digits as its factorization.

20837273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 20837273 is about 4564.7861943359. The cubic root of 20837273 is about 275.1779476383.

The spelling of 20837273 in words is "twenty million, eight hundred thirty-seven thousand, two hundred seventy-three".