20632439 has 2 divisors, whose sum is σ = 20632440. Its totient is φ = 20632438.

The previous prime is 20632429. The next prime is 20632481. The reversal of 20632439 is 93423602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20632439 - 2²⁴ = 3855223 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20632429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10316219 + 10316220.

It is an arithmetic number, because the mean of its divisors is an integer number (10316220).

Almost surely, 2^20632439 is an apocalyptic number.

20632439 is a deficient number, since it is larger than the sum of its proper divisors (1).

20632439 is an equidigital number, since it uses as much as digits as its factorization.

20632439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 20632439 is about 4542.2944642548. The cubic root of 20632439 is about 274.2732945481.

The spelling of 20632439 in words is "twenty million, six hundred thirty-two thousand, four hundred thirty-nine".