20638283 has 2 divisors, whose sum is σ = 20638284. Its totient is φ = 20638282.

The previous prime is 20638279. The next prime is 20638301. The reversal of 20638283 is 38283602.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20638283 - 2² = 20638279 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20638223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10319141 + 10319142.

It is an arithmetic number, because the mean of its divisors is an integer number (10319142).

Almost surely, 2^20638283 is an apocalyptic number.

20638283 is a deficient number, since it is larger than the sum of its proper divisors (1).

20638283 is an equidigital number, since it uses as much as digits as its factorization.

20638283 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 20638283 is about 4542.9377059343. The cubic root of 20638283 is about 274.2991874608.

The spelling of 20638283 in words is "twenty million, six hundred thirty-eight thousand, two hundred eighty-three".