20481888 has 96 divisors (see below), whose sum is σ = 63624960. Its totient is φ = 5644800.

The previous prime is 20481887. The next prime is 20481913. The reversal of 20481888 is 88818402.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20481887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18963 + ... + 20013.

It is an arithmetic number, because the mean of its divisors is an integer number (662760).

Almost surely, 2^20481888 is an apocalyptic number.

20481888 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 20481888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31812480).

20481888 is an abundant number, since it is smaller than the sum of its proper divisors (43143072).

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

20481888 is a wasteful number, since it uses less digits than its factorization.

20481888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100 (or 1092 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 39.

The square root of 20481888 is about 4525.6919912871. The cubic root of 20481888 is about 273.6045585917.

The spelling of 20481888 in words is "twenty million, four hundred eighty-one thousand, eight hundred eighty-eight".