20587339 has 2 divisors, whose sum is σ = 20587340. Its totient is φ = 20587338.

The previous prime is 20587337. The next prime is 20587349. The reversal of 20587339 is 93378502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20587339 - 2¹ = 20587337 is a prime.

Together with 20587337, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20587298 and 20587307.

It is not a weakly prime, because it can be changed into another prime (20587337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10293669 + 10293670.

It is an arithmetic number, because the mean of its divisors is an integer number (10293670).

Almost surely, 2^20587339 is an apocalyptic number.

20587339 is a deficient number, since it is larger than the sum of its proper divisors (1).

20587339 is an equidigital number, since it uses as much as digits as its factorization.

20587339 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 20587339 is about 4537.3272969888. The cubic root of 20587339 is about 274.0733060825.

The spelling of 20587339 in words is "twenty million, five hundred eighty-seven thousand, three hundred thirty-nine".