20439126 has 24 divisors (see below), whose sum is σ = 44638464. Its totient is φ = 6758640.

The previous prime is 20439121. The next prime is 20439143. The reversal of 20439126 is 62193402.

It is a self number, because there is not a number n which added to its sum of digits gives 20439126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20439121) 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, 2185 + ... + 6756.

It is an arithmetic number, because the mean of its divisors is an integer number (1859936).

Almost surely, 2^20439126 is an apocalyptic number.

20439126 is an abundant number, since it is smaller than the sum of its proper divisors (24199338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20439126 is a wasteful number, since it uses less digits than its factorization.

20439126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9076 (or 9073 counting only the distinct ones).

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

The square root of 20439126 is about 4520.9651624404. The cubic root of 20439126 is about 273.4140157747.

The spelling of 20439126 in words is "twenty million, four hundred thirty-nine thousand, one hundred twenty-six".