20283320 has 32 divisors (see below), whose sum is σ = 46612800. Its totient is φ = 7939968.

The previous prime is 20283313. The next prime is 20283323. The reversal of 20283320 is 2338202.

It is a happy number.

It is a super-2 number, since 2×20283320² = 822826140444800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20283292 and 20283301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20283323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3515 + ... + 7274.

It is an arithmetic number, because the mean of its divisors is an integer number (1456650).

Almost surely, 2^20283320 is an apocalyptic number.

20283320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20283320 is an abundant number, since it is smaller than the sum of its proper divisors (26329480).

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

20283320 is a wasteful number, since it uses less digits than its factorization.

20283320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10847 (or 10843 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 20283320 is about 4503.7007005351. The cubic root of 20283320 is about 272.7175044313.

The spelling of 20283320 in words is "twenty million, two hundred eighty-three thousand, three hundred twenty".