20906039 has 16 divisors (see below), whose sum is σ = 27599616. Its totient is φ = 15331200.

The previous prime is 20906033. The next prime is 20906051. The reversal of 20906039 is 93060902.

It is a cyclic number.

It is not a de Polignac number, because 20906039 - 2¹² = 20901943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20906033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6677 + ... + 9294.

It is an arithmetic number, because the mean of its divisors is an integer number (1724976).

Almost surely, 2^20906039 is an apocalyptic number.

20906039 is a deficient number, since it is larger than the sum of its proper divisors (6693577).

20906039 is a wasteful number, since it uses less digits than its factorization.

20906039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16006.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 20906039 is about 4572.3122159363. The cubic root of 20906039 is about 275.4803241976.

The spelling of 20906039 in words is "twenty million, nine hundred six thousand, thirty-nine".