20555248 has 40 divisors (see below), whose sum is σ = 45774848. Its totient is φ = 8759232.

The previous prime is 20555243. The next prime is 20555251. The reversal of 20555248 is 84255502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20555243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24565 + ... + 25387.

Almost surely, 2^20555248 is an apocalyptic number.

20555248 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20555248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22887424).

20555248 is an abundant number, since it is smaller than the sum of its proper divisors (25219600).

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

20555248 is a wasteful number, since it uses less digits than its factorization.

20555248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061 (or 1055 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 31.

The square root of 20555248 is about 4533.7895848837. The cubic root of 20555248 is about 273.9308259498.

The spelling of 20555248 in words is "twenty million, five hundred fifty-five thousand, two hundred forty-eight".