20330340 has 24 divisors (see below), whose sum is σ = 56925120. Its totient is φ = 5421408.

The previous prime is 20330339. The next prime is 20330369. The reversal of 20330340 is 4303302.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169360 + ... + 169479.

It is an arithmetic number, because the mean of its divisors is an integer number (2371880).

Almost surely, 2^20330340 is an apocalyptic number.

20330340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20330340 is an abundant number, since it is smaller than the sum of its proper divisors (36594780).

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

20330340 is a wasteful number, since it uses less digits than its factorization.

20330340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338851 (or 338849 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 15.

The square root of 20330340 is about 4508.9178302559. The cubic root of 20330340 is about 272.9280761567.

Adding to 20330340 its reverse (4303302), we get a palindrome (24633642).

The spelling of 20330340 in words is "twenty million, three hundred thirty thousand, three hundred forty".