20474128 has 40 divisors (see below), whose sum is σ = 40979520. Its totient is φ = 9905280.

The previous prime is 20474123. The next prime is 20474143. The reversal of 20474128 is 82147402.

It is a junction number, because it is equal to n+sod(n) for n = 20474096 and 20474105.

It is not an unprimeable number, because it can be changed into a prime (20474123) 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, 75978 + ... + 76246.

It is an arithmetic number, because the mean of its divisors is an integer number (1024488).

Almost surely, 2^20474128 is an apocalyptic number.

It is an amenable number.

20474128 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

20474128 is a wasteful number, since it uses less digits than its factorization.

20474128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415 (or 409 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 20474128 is about 4524.8345826118. The cubic root of 20474128 is about 273.5700005866.

It can be divided in two parts, 20474 and 128, that added together give a palindrome (20602).

The spelling of 20474128 in words is "twenty million, four hundred seventy-four thousand, one hundred twenty-eight".