20312130340 has 24 divisors (see below), whose sum is σ = 42666446592. Its totient is φ = 8122762080.

The previous prime is 20312130331. The next prime is 20312130343. The reversal of 20312130340 is 4303121302.

It is not an unprimeable number, because it can be changed into a prime (20312130343) 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, 49716 + ... + 207595.

It is an arithmetic number, because the mean of its divisors is an integer number (1777768608).

Almost surely, 2^20312130340 is an apocalyptic number.

20312130340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20312130340 is an abundant number, since it is smaller than the sum of its proper divisors (22354316252).

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

20312130340 is a wasteful number, since it uses less digits than its factorization.

20312130340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261267 (or 261265 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20312130340 its reverse (4303121302), we get a palindrome (24615251642).

The spelling of 20312130340 in words is "twenty billion, three hundred twelve million, one hundred thirty thousand, three hundred forty".