20002128 has 40 divisors (see below), whose sum is σ = 52082976. Its totient is φ = 6614400.

The previous prime is 20002123. The next prime is 20002133. The reversal of 20002128 is 82120002.

It is an interprime number because it is at equal distance from previous prime (20002123) and next prime (20002133).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4698 + ... + 7878.

Almost surely, 2^20002128 is an apocalyptic number.

It is an amenable number.

20002128 is an abundant number, since it is smaller than the sum of its proper divisors (32080848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20002128 is a wasteful number, since it uses less digits than its factorization.

20002128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3323 (or 3317 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 20002128 is about 4472.3738663041. The cubic root of 20002128 is about 271.4513884525.

The spelling of 20002128 in words is "twenty million, two thousand, one hundred twenty-eight".