20803480 has 64 divisors (see below), whose sum is σ = 50918400. Its totient is φ = 7620480.

The previous prime is 20803417. The next prime is 20803487. The reversal of 20803480 is 8430802.

It is a super-2 number, since 2×20803480² = 865569560220800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20803487) 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, 23119 + ... + 24001.

It is an arithmetic number, because the mean of its divisors is an integer number (795600).

Almost surely, 2^20803480 is an apocalyptic number.

20803480 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 20803480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25459200).

20803480 is an abundant number, since it is smaller than the sum of its proper divisors (30114920).

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

20803480 is a wasteful number, since it uses less digits than its factorization.

20803480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944 (or 940 counting only the distinct ones).

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

The square root of 20803480 is about 4561.0832046785. The cubic root of 20803480 is about 275.0291098662.

The spelling of 20803480 in words is "twenty million, eight hundred three thousand, four hundred eighty".