20803860 has 288 divisors, whose sum is σ = 83865600. Its totient is φ = 4043520.

The previous prime is 20803847. The next prime is 20803877. The reversal of 20803860 is 6830802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 263301 + ... + 263379.

It is an arithmetic number, because the mean of its divisors is an integer number (291200).

Almost surely, 2^20803860 is an apocalyptic number.

20803860 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 20803860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41932800).

20803860 is an abundant number, since it is smaller than the sum of its proper divisors (63061740).

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

20803860 is a wasteful number, since it uses less digits than its factorization.

20803860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 20803860 is about 4561.1248612596. The cubic root of 20803860 is about 275.0307844325.

The spelling of 20803860 in words is "twenty million, eight hundred three thousand, eight hundred sixty".