20540448 has 72 divisors (see below), whose sum is σ = 59272668. Its totient is φ = 6746112.

The previous prime is 20540441. The next prime is 20540453. The reversal of 20540448 is 84404502.

It can be written as a sum of positive squares in 2 ways, for example, as 18766224 + 1774224 = 4332^2 + 1332^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (20540441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20536 + ... + 21512.

Almost surely, 2^20540448 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 20540448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29636334).

20540448 is an abundant number, since it is smaller than the sum of its proper divisors (38732220).

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

20540448 is a wasteful number, since it uses less digits than its factorization.

20540448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066 (or 1055 counting only the distinct ones).

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

The square root of 20540448 is about 4532.1571023079. The cubic root of 20540448 is about 273.8650657827.

The spelling of 20540448 in words is "twenty million, five hundred forty thousand, four hundred forty-eight".