20803380 has 96 divisors (see below), whose sum is σ = 63504000. Its totient is φ = 5058048.

The previous prime is 20803373. The next prime is 20803399. The reversal of 20803380 is 8330802.

It is a self number, because there is not a number n which added to its sum of digits gives 20803380.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116131 + ... + 116309.

It is an arithmetic number, because the mean of its divisors is an integer number (661500).

Almost surely, 2^20803380 is an apocalyptic number.

20803380 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 20803380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31752000).

20803380 is an abundant number, since it is smaller than the sum of its proper divisors (42700620).

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

20803380 is a wasteful number, since it uses less digits than its factorization.

20803380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353 (or 351 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 20803380 is about 4561.0722423571. The cubic root of 20803380 is about 275.0286691874.

It can be divided in two parts, 2080 and 3380, that added together give a triangular number (5460 = T₁₀₄).

The spelling of 20803380 in words is "twenty million, eight hundred three thousand, three hundred eighty".