20829039 has 32 divisors (see below), whose sum is σ = 35575296. Its totient is φ = 10523520.

The previous prime is 20829023. The next prime is 20829103. The reversal of 20829039 is 93092802.

It is not a de Polignac number, because 20829039 - 2⁴ = 20829023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20829019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7329 + ... + 9765.

It is an arithmetic number, because the mean of its divisors is an integer number (1111728).

Almost surely, 2^20829039 is an apocalyptic number.

20829039 is a deficient number, since it is larger than the sum of its proper divisors (14746257).

20829039 is a wasteful number, since it uses less digits than its factorization.

20829039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2495.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 20829039 is about 4563.8842009849. The cubic root of 20829039 is about 275.1416966737.

The spelling of 20829039 in words is "twenty million, eight hundred twenty-nine thousand, thirty-nine".