20578448 has 20 divisors (see below), whose sum is σ = 43495728. Its totient is φ = 9353760.

The previous prime is 20578421. The next prime is 20578457. The reversal of 20578448 is 84487502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58286 + ... + 58637.

Almost surely, 2^20578448 is an apocalyptic number.

It is an amenable number.

20578448 is an abundant number, since it is smaller than the sum of its proper divisors (22917280).

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

20578448 is a wasteful number, since it uses less digits than its factorization.

20578448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116942 (or 116936 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 38.

The square root of 20578448 is about 4536.3474293753. The cubic root of 20578448 is about 274.0338459620.

The spelling of 20578448 in words is "twenty million, five hundred seventy-eight thousand, four hundred forty-eight".