20791039 has 8 divisors (see below), whose sum is σ = 21086048. Its totient is φ = 20498400.

The previous prime is 20791037. The next prime is 20791081. The reversal of 20791039 is 93019702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20791039 - 2¹ = 20791037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20791039.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20791031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23269 + ... + 24145.

It is an arithmetic number, because the mean of its divisors is an integer number (2635756).

Almost surely, 2^20791039 is an apocalyptic number.

20791039 is a deficient number, since it is larger than the sum of its proper divisors (295009).

20791039 is a wasteful number, since it uses less digits than its factorization.

20791039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 20791039 is about 4559.7191799496. The cubic root of 20791039 is about 274.9742741775.

It can be divided in two parts, 2079 and 1039, that multiplied together give a triangular number (2160081 = T₂₀₇₈).

The spelling of 20791039 in words is "twenty million, seven hundred ninety-one thousand, thirty-nine".