20612439 has 12 divisors (see below), whose sum is σ = 31068336. Its totient is φ = 13144032.

The previous prime is 20612429. The next prime is 20612447. The reversal of 20612439 is 93421602.

20612439 is a `hidden beast` number, since 2 + 0 + 612 + 43 + 9 = 666.

It is not a de Polignac number, because 20612439 - 2⁸ = 20612183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20612419) 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 in 11 ways as a sum of consecutive naturals, for example, 49582 + ... + 49995.

It is an arithmetic number, because the mean of its divisors is an integer number (2589028).

Almost surely, 2^20612439 is an apocalyptic number.

20612439 is a deficient number, since it is larger than the sum of its proper divisors (10455897).

20612439 is a wasteful number, since it uses less digits than its factorization.

20612439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99606 (or 99603 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 20612439 is about 4540.0923999408. The cubic root of 20612439 is about 274.1846438674.

The spelling of 20612439 in words is "twenty million, six hundred twelve thousand, four hundred thirty-nine".