20466128 has 10 divisors (see below), whose sum is σ = 39653154. Its totient is φ = 10233056.

The previous prime is 20466119. The next prime is 20466139. The reversal of 20466128 is 82166402.

It can be written as a sum of positive squares in only one way, i.e., 13454224 + 7011904 = 3668^2 + 2648^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20466128.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639551 + ... + 639582.

Almost surely, 2^20466128 is an apocalyptic number.

It is an amenable number.

20466128 is a deficient number, since it is larger than the sum of its proper divisors (19187026).

20466128 is a wasteful number, since it uses less digits than its factorization.

20466128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279141 (or 1279135 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 20466128 is about 4523.9504860244. The cubic root of 20466128 is about 273.5343646348.

The spelling of 20466128 in words is "twenty million, four hundred sixty-six thousand, one hundred twenty-eight".