20043880 has 32 divisors (see below), whose sum is σ = 45676800. Its totient is φ = 7914816.

The previous prime is 20043871. The next prime is 20043913. The reversal of 20043880 is 8834002.

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 7 ways as a sum of consecutive naturals, for example, 12 + ... + 6331.

It is an arithmetic number, because the mean of its divisors is an integer number (1427400).

Almost surely, 2^20043880 is an apocalyptic number.

20043880 is a gapful number since it is divisible by the number (20) 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 20043880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22838400).

20043880 is an abundant number, since it is smaller than the sum of its proper divisors (25632920).

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

20043880 is a wasteful number, since it uses less digits than its factorization.

20043880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6433 (or 6429 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 20043880 is about 4477.0392001858. The cubic root of 20043880 is about 271.6401310643.

Adding to 20043880 its reverse (8834002), we get a palindrome (28877882).

The spelling of 20043880 in words is "twenty million, forty-three thousand, eight hundred eighty".