20455488 has 84 divisors (see below), whose sum is σ = 62110620. Its totient is φ = 6414336.

The previous prime is 20455483. The next prime is 20455499. The reversal of 20455488 is 88455402.

20455488 is a `hidden beast` number, since 20 + 4 + 554 + 88 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17040384 + 3415104 = 4128^2 + 1848^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20455483) 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, 8748 + ... + 10836.

Almost surely, 2^20455488 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 20455488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31055310).

20455488 is an abundant number, since it is smaller than the sum of its proper divisors (41655132).

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

20455488 is a wasteful number, since it uses less digits than its factorization.

20455488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2124 (or 2111 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 36.

The square root of 20455488 is about 4522.7743697868. The cubic root of 20455488 is about 273.4869544270.

The spelling of 20455488 in words is "twenty million, four hundred fifty-five thousand, four hundred eighty-eight".