20504448 has 128 divisors (see below), whose sum is σ = 64260000. Its totient is φ = 6414336.

The previous prime is 20504437. The next prime is 20504453. The reversal of 20504448 is 84440502.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58578 + ... + 58926.

Almost surely, 2^20504448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20504448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32130000).

20504448 is an abundant number, since it is smaller than the sum of its proper divisors (43755552).

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

20504448 is a wasteful number, since it uses less digits than its factorization.

20504448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 20504448 is about 4528.1837418550. The cubic root of 20504448 is about 273.7049766450.

The spelling of 20504448 in words is "twenty million, five hundred four thousand, four hundred forty-eight".