20371873 has 2 divisors, whose sum is σ = 20371874. Its totient is φ = 20371872.

The previous prime is 20371861. The next prime is 20371927. The reversal of 20371873 is 37817302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20277009 + 94864 = 4503^2 + 308^2 .

It is a cyclic number.

It is not a de Polignac number, because 20371873 - 2²¹ = 18274721 is a prime.

It is not a weakly prime, because it can be changed into another prime (20371853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10185936 + 10185937.

It is an arithmetic number, because the mean of its divisors is an integer number (10185937).

Almost surely, 2^20371873 is an apocalyptic number.

It is an amenable number.

20371873 is a deficient number, since it is larger than the sum of its proper divisors (1).

20371873 is an equidigital number, since it uses as much as digits as its factorization.

20371873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 20371873 is about 4513.5211310018. The cubic root of 20371873 is about 273.1138053247.

The spelling of 20371873 in words is "twenty million, three hundred seventy-one thousand, eight hundred seventy-three".