20128802 has 8 divisors (see below), whose sum is σ = 30319212. Its totient is φ = 10022400.

The previous prime is 20128793. The next prime is 20128837. The reversal of 20128802 is 20882102.

It can be written as a sum of positive squares in 2 ways, for example, as 18826921 + 1301881 = 4339^2 + 1141^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20399 + ... + 21362.

Almost surely, 2^20128802 is an apocalyptic number.

20128802 is a deficient number, since it is larger than the sum of its proper divisors (10190410).

20128802 is a wasteful number, since it uses less digits than its factorization.

20128802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42004.

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

The square root of 20128802 is about 4486.5133455725. The cubic root of 20128802 is about 272.0232192549.

The spelling of 20128802 in words is "twenty million, one hundred twenty-eight thousand, eight hundred two".