20838628 has 6 divisors (see below), whose sum is σ = 36467606. Its totient is φ = 10419312.

The previous prime is 20838599. The next prime is 20838641. The reversal of 20838628 is 82683802.

It can be written as a sum of positive squares in only one way, i.e., 12124324 + 8714304 = 3482^2 + 2952^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2604825 + ... + 2604832.

Almost surely, 2^20838628 is an apocalyptic number.

It is an amenable number.

20838628 is a deficient number, since it is larger than the sum of its proper divisors (15628978).

20838628 is a wasteful number, since it uses less digits than its factorization.

20838628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5209661 (or 5209659 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 20838628 is about 4564.9346107036. The cubic root of 20838628 is about 275.1839122390.

The spelling of 20838628 in words is "twenty million, eight hundred thirty-eight thousand, six hundred twenty-eight".