20462839 has 4 divisors (see below), whose sum is σ = 20751120. Its totient is φ = 20174560.

The previous prime is 20462837. The next prime is 20462861. The reversal of 20462839 is 93826402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20462839 - 2¹ = 20462837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20462833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144034 + ... + 144175.

It is an arithmetic number, because the mean of its divisors is an integer number (5187780).

Almost surely, 2^20462839 is an apocalyptic number.

20462839 is a deficient number, since it is larger than the sum of its proper divisors (288281).

20462839 is an equidigital number, since it uses as much as digits as its factorization.

20462839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288280.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 20462839 is about 4523.5869616931. The cubic root of 20462839 is about 273.5197111103.

The spelling of 20462839 in words is "twenty million, four hundred sixty-two thousand, eight hundred thirty-nine".