20463239 has 2 divisors, whose sum is σ = 20463240. Its totient is φ = 20463238.

The previous prime is 20463229. The next prime is 20463251. The reversal of 20463239 is 93236402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20463239 - 2⁸ = 20462983 is a prime.

It is a super-2 number, since 2×20463239² = 837488300742242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20463229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10231619 + 10231620.

It is an arithmetic number, because the mean of its divisors is an integer number (10231620).

Almost surely, 2^20463239 is an apocalyptic number.

20463239 is a deficient number, since it is larger than the sum of its proper divisors (1).

20463239 is an equidigital number, since it uses as much as digits as its factorization.

20463239 is an odious number, because the sum of its binary digits is odd.

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

The square root of 20463239 is about 4523.6311741785. The cubic root of 20463239 is about 273.5214933194.

It can be divided in two parts, 20463 and 239, that added together give a palindrome (20702).

The spelling of 20463239 in words is "twenty million, four hundred sixty-three thousand, two hundred thirty-nine".