20620128 has 48 divisors (see below), whose sum is σ = 54371520. Its totient is φ = 6842496.

The previous prime is 20620123. The next prime is 20620129. The reversal of 20620128 is 82102602.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20620123) 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 7 ways as a sum of consecutive naturals, for example, 33003 + ... + 33621.

It is an arithmetic number, because the mean of its divisors is an integer number (1132740).

Almost surely, 2^20620128 is an apocalyptic number.

It is an amenable number.

20620128 is an abundant number, since it is smaller than the sum of its proper divisors (33751392).

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

20620128 is a wasteful number, since it uses less digits than its factorization.

20620128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979 (or 971 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 20620128 is about 4540.9391099199. The cubic root of 20620128 is about 274.2187324040.

The spelling of 20620128 in words is "twenty million, six hundred twenty thousand, one hundred twenty-eight".