20682128 has 10 divisors (see below), whose sum is σ = 40071654. Its totient is φ = 10341056.

The previous prime is 20682119. The next prime is 20682131. The reversal of 20682128 is 82128602.

It can be written as a sum of positive squares in only one way, i.e., 19963024 + 719104 = 4468^2 + 848^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20682128.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 646301 + ... + 646332.

Almost surely, 2^20682128 is an apocalyptic number.

It is an amenable number.

20682128 is a deficient number, since it is larger than the sum of its proper divisors (19389526).

20682128 is a wasteful number, since it uses less digits than its factorization.

20682128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292641 (or 1292635 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 20682128 is about 4547.7607676746. The cubic root of 20682128 is about 274.4932950365.

The spelling of 20682128 in words is "twenty million, six hundred eighty-two thousand, one hundred twenty-eight".