20525668 has 6 divisors (see below), whose sum is σ = 35919926. Its totient is φ = 10262832.

The previous prime is 20525657. The next prime is 20525671. The reversal of 20525668 is 86652502.

It can be written as a sum of positive squares in only one way, i.e., 11573604 + 8952064 = 3402^2 + 2992^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2565705 + ... + 2565712.

Almost surely, 2^20525668 is an apocalyptic number.

It is an amenable number.

20525668 is a deficient number, since it is larger than the sum of its proper divisors (15394258).

20525668 is a wasteful number, since it uses less digits than its factorization.

20525668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5131421 (or 5131419 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 20525668 is about 4530.5262387498. The cubic root of 20525668 is about 273.7993629490.

The spelling of 20525668 in words is "twenty million, five hundred twenty-five thousand, six hundred sixty-eight".