20518848 has 126 divisors (see below), whose sum is σ = 68509896. Its totient is φ = 5854464.

The previous prime is 20518811. The next prime is 20518853. The reversal of 20518848 is 84881502.

It is a tau number, because it is divible by the number of its divisors (126).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 27861 + ... + 28587.

Almost surely, 2^20518848 is an apocalyptic number.

20518848 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 20518848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34254948).

20518848 is an abundant number, since it is smaller than the sum of its proper divisors (47991048).

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

20518848 is a wasteful number, since it uses less digits than its factorization.

20518848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759 (or 739 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 20518848 is about 4529.7735042715. The cubic root of 20518848 is about 273.7690347682.

The spelling of 20518848 in words is "twenty million, five hundred eighteen thousand, eight hundred forty-eight".