20128396 has 6 divisors (see below), whose sum is σ = 35224700. Its totient is φ = 10064196.

The previous prime is 20128387. The next prime is 20128399. The reversal of 20128396 is 69382102.

It is not an unprimeable number, because it can be changed into a prime (20128399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2516046 + ... + 2516053.

Almost surely, 2^20128396 is an apocalyptic number.

It is an amenable number.

20128396 is a deficient number, since it is larger than the sum of its proper divisors (15096304).

20128396 is a wasteful number, since it uses less digits than its factorization.

20128396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5032103 (or 5032101 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 20128396 is about 4486.4680986272. The cubic root of 20128396 is about 272.0213903305.

The spelling of 20128396 in words is "twenty million, one hundred twenty-eight thousand, three hundred ninety-six".