20766128 has 20 divisors (see below), whose sum is σ = 40322568. Its totient is φ = 10360320.

The previous prime is 20766127. The next prime is 20766133. The reversal of 20766128 is 82166702.

It is a super-2 number, since 2×20766128² = 862464144224768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20766094 and 20766103.

It is not an unprimeable number, because it can be changed into a prime (20766121) 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, 8000 + ... + 10272.

Almost surely, 2^20766128 is an apocalyptic number.

It is an amenable number.

20766128 is a deficient number, since it is larger than the sum of its proper divisors (19556440).

20766128 is a wasteful number, since it uses less digits than its factorization.

20766128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2852 (or 2846 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 20766128 is about 4556.9867237024. The cubic root of 20766128 is about 274.8644091900.

The spelling of 20766128 in words is "twenty million, seven hundred sixty-six thousand, one hundred twenty-eight".