20628038 has 16 divisors (see below), whose sum is σ = 33092064. Its totient is φ = 9609600.

The previous prime is 20628031. The next prime is 20628059. The reversal of 20628038 is 83082602.

It is a self number, because there is not a number n which added to its sum of digits gives 20628038.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431 + ... + 6437.

It is an arithmetic number, because the mean of its divisors is an integer number (2068254).

Almost surely, 2^20628038 is an apocalyptic number.

20628038 is a deficient number, since it is larger than the sum of its proper divisors (12464026).

20628038 is a wasteful number, since it uses less digits than its factorization.

20628038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6127.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 20628038 is about 4541.8099916223. The cubic root of 20628038 is about 274.2537918836.

The spelling of 20628038 in words is "twenty million, six hundred twenty-eight thousand, thirty-eight".