20304324140 has 24 divisors (see below), whose sum is σ = 42765620352. Its totient is φ = 8097626880.

The previous prime is 20304324121. The next prime is 20304324149. The reversal of 20304324140 is 4142340302.

It is not an unprimeable number, because it can be changed into a prime (20304324149) 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, 1499516 + ... + 1512995.

It is an arithmetic number, because the mean of its divisors is an integer number (1781900848).

Almost surely, 2^20304324140 is an apocalyptic number.

20304324140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20304324140 is an abundant number, since it is smaller than the sum of its proper divisors (22461296212).

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

20304324140 is a wasteful number, since it uses less digits than its factorization.

20304324140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3012857 (or 3012855 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 20304324140 its reverse (4142340302), we get a palindrome (24446664442).

The spelling of 20304324140 in words is "twenty billion, three hundred four million, three hundred twenty-four thousand, one hundred forty".