20000308240 has 80 divisors (see below), whose sum is σ = 53712097920. Its totient is φ = 6845020160.

The previous prime is 20000308217. The next prime is 20000308249. The reversal of 20000308240 is 4280300002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (20000308249) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 653500 + ... + 683419.

It is an arithmetic number, because the mean of its divisors is an integer number (671401224).

Almost surely, 2^20000308240 is an apocalyptic number.

20000308240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20000308240 is an abundant number, since it is smaller than the sum of its proper divisors (33711789680).

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

20000308240 is a wasteful number, since it uses less digits than its factorization.

20000308240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336960 (or 1336954 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20000308240 its reverse (4280300002), we get a palindrome (24280608242).

The spelling of 20000308240 in words is "twenty billion, three hundred eight thousand, two hundred forty".