20334540 has 24 divisors (see below), whose sum is σ = 56936880. Its totient is φ = 5422528.

The previous prime is 20334529. The next prime is 20334551. The reversal of 20334540 is 4543302.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20334529) and next prime (20334551).

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, 169395 + ... + 169514.

It is an arithmetic number, because the mean of its divisors is an integer number (2372370).

Almost surely, 2^20334540 is an apocalyptic number.

20334540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20334540 is an abundant number, since it is smaller than the sum of its proper divisors (36602340).

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

20334540 is a wasteful number, since it uses less digits than its factorization.

20334540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338921 (or 338919 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 20334540 is about 4509.3835498879. The cubic root of 20334540 is about 272.9468693986.

Adding to 20334540 its reverse (4543302), we get a palindrome (24877842).

It can be divided in two parts, 203 and 34540, that added together give a palindrome (34743).

The spelling of 20334540 in words is "twenty million, three hundred thirty-four thousand, five hundred forty".