20346128 has 20 divisors (see below), whose sum is σ = 43004688. Its totient is φ = 9248160.

The previous prime is 20346121. The next prime is 20346187. The reversal of 20346128 is 82164302.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 20346097 and 20346106.

It is not an unprimeable number, because it can be changed into a prime (20346121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57626 + ... + 57977.

Almost surely, 2^20346128 is an apocalyptic number.

It is an amenable number.

20346128 is an abundant number, since it is smaller than the sum of its proper divisors (22658560).

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

20346128 is a wasteful number, since it uses less digits than its factorization.

20346128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115622 (or 115616 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 20346128 is about 4510.6682431764. The cubic root of 20346128 is about 272.9987074321.

The spelling of 20346128 in words is "twenty million, three hundred forty-six thousand, one hundred twenty-eight".