20812028 has 12 divisors (see below), whose sum is σ = 36663312. Its totient is φ = 10336800.

The previous prime is 20812021. The next prime is 20812039. The reversal of 20812028 is 82021802.

It is a junction number, because it is equal to n+sod(n) for n = 20811994 and 20812012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20812021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16625 + ... + 17832.

It is an arithmetic number, because the mean of its divisors is an integer number (3055276).

Almost surely, 2^20812028 is an apocalyptic number.

It is an amenable number.

20812028 is a deficient number, since it is larger than the sum of its proper divisors (15851284).

20812028 is a wasteful number, since it uses less digits than its factorization.

20812028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34612 (or 34610 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 20812028 is about 4562.0201665490. The cubic root of 20812028 is about 275.0667738677.

The spelling of 20812028 in words is "twenty million, eight hundred twelve thousand, twenty-eight".