20625188 has 6 divisors (see below), whose sum is σ = 36094086. Its totient is φ = 10312592.

The previous prime is 20625179. The next prime is 20625191. The reversal of 20625188 is 88152602.

It can be written as a sum of positive squares in only one way, i.e., 13823524 + 6801664 = 3718^2 + 2608^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2578145 + ... + 2578152.

It is an arithmetic number, because the mean of its divisors is an integer number (6015681).

Almost surely, 2^20625188 is an apocalyptic number.

It is an amenable number.

20625188 is a deficient number, since it is larger than the sum of its proper divisors (15468898).

20625188 is a wasteful number, since it uses less digits than its factorization.

20625188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5156301 (or 5156299 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 20625188 is about 4541.4962292179. The cubic root of 20625188 is about 274.2411608665.

The spelling of 20625188 in words is "twenty million, six hundred twenty-five thousand, one hundred eighty-eight".