20128336 has 20 divisors (see below), whose sum is σ = 39124852. Its totient is φ = 10031616.

The previous prime is 20128327. The next prime is 20128337. The reversal of 20128336 is 63382102.

It can be written as a sum of positive squares in 2 ways, for example, as 8156736 + 11971600 = 2856^2 + 3460^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20128336.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20128337) 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, 3526 + ... + 7258.

Almost surely, 2^20128336 is an apocalyptic number.

It is an amenable number.

20128336 is a deficient number, since it is larger than the sum of its proper divisors (18996516).

20128336 is a wasteful number, since it uses less digits than its factorization.

20128336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4078 (or 4072 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 20128336 is about 4486.4614118479. The cubic root of 20128336 is about 272.0211200440.

The spelling of 20128336 in words is "twenty million, one hundred twenty-eight thousand, three hundred thirty-six".