20842337 has 2 divisors, whose sum is σ = 20842338. Its totient is φ = 20842336.

The previous prime is 20842319. The next prime is 20842343. The reversal of 20842337 is 73324802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19678096 + 1164241 = 4436^2 + 1079^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20842337 is a prime.

It is not a weakly prime, because it can be changed into another prime (20842397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10421168 + 10421169.

It is an arithmetic number, because the mean of its divisors is an integer number (10421169).

Almost surely, 2^20842337 is an apocalyptic number.

It is an amenable number.

20842337 is a deficient number, since it is larger than the sum of its proper divisors (1).

20842337 is an equidigital number, since it uses as much as digits as its factorization.

20842337 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 20842337 is about 4565.3408416021. The cubic root of 20842337 is about 275.2002376353.

The spelling of 20842337 in words is "twenty million, eight hundred forty-two thousand, three hundred thirty-seven".