20628039 has 8 divisors (see below), whose sum is σ = 27565312. Its totient is φ = 13721400.

The previous prime is 20628031. The next prime is 20628059. The reversal of 20628039 is 93082602.

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

It is not a de Polignac number, because 20628039 - 2³ = 20628031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20627997 and 20628015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20628031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6037 + ... + 8814.

It is an arithmetic number, because the mean of its divisors is an integer number (3445664).

Almost surely, 2^20628039 is an apocalyptic number.

20628039 is a deficient number, since it is larger than the sum of its proper divisors (6937273).

20628039 is a wasteful number, since it uses less digits than its factorization.

20628039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15317.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 20628039 is about 4541.8101017106. The cubic root of 20628039 is about 274.2537963154.

It can be divided in two parts, 2062 and 8039, that added together give a palindrome (10101).

The spelling of 20628039 in words is "twenty million, six hundred twenty-eight thousand, thirty-nine".