20630451239 has 2 divisors, whose sum is σ = 20630451240. Its totient is φ = 20630451238.

The previous prime is 20630451227. The next prime is 20630451253. The reversal of 20630451239 is 93215403602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20630451239 - 2⁴ = 20630451223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20630451199 and 20630451208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20630451739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10315225619 + 10315225620.

It is an arithmetic number, because the mean of its divisors is an integer number (10315225620).

Almost surely, 2^20630451239 is an apocalyptic number.

20630451239 is a deficient number, since it is larger than the sum of its proper divisors (1).

20630451239 is an equidigital number, since it uses as much as digits as its factorization.

20630451239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 35.

The spelling of 20630451239 in words is "twenty billion, six hundred thirty million, four hundred fifty-one thousand, two hundred thirty-nine".