20463939 has 6 divisors (see below), whose sum is σ = 29559036. Its totient is φ = 13642620.

The previous prime is 20463907. The next prime is 20463953. The reversal of 20463939 is 93936402.

It is a happy number.

It is not a de Polignac number, because 20463939 - 2⁵ = 20463907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20463979) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1136877 + ... + 1136894.

It is an arithmetic number, because the mean of its divisors is an integer number (4926506).

Almost surely, 2^20463939 is an apocalyptic number.

20463939 is a deficient number, since it is larger than the sum of its proper divisors (9095097).

20463939 is a wasteful number, since it uses less digits than its factorization.

20463939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2273777 (or 2273774 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 20463939 is about 4523.7085449883. The cubic root of 20463939 is about 273.5246121294.

It can be divided in two parts, 2046393 and 9, that added together give a palindrome (2046402).

The spelling of 20463939 in words is "twenty million, four hundred sixty-three thousand, nine hundred thirty-nine".