20563448 has 8 divisors (see below), whose sum is σ = 38556480. Its totient is φ = 10281720.

The previous prime is 20563399. The next prime is 20563457. The reversal of 20563448 is 84436502.

It is a tau number, because it is divible by the number of its divisors (8).

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, 1285208 + ... + 1285223.

It is an arithmetic number, because the mean of its divisors is an integer number (4819560).

Almost surely, 2^20563448 is an apocalyptic number.

It is an amenable number.

20563448 is a deficient number, since it is larger than the sum of its proper divisors (17993032).

20563448 is a wasteful number, since it uses less digits than its factorization.

20563448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2570437 (or 2570433 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 20563448 is about 4534.6938154632. The cubic root of 20563448 is about 273.9672470485.

The spelling of 20563448 in words is "twenty million, five hundred sixty-three thousand, four hundred forty-eight".