20351340320 has 48 divisors (see below), whose sum is σ = 48331842048. Its totient is φ = 8097903360.

The previous prime is 20351340313. The next prime is 20351340323. The reversal of 20351340320 is 2304315302.

It is not an unprimeable number, because it can be changed into a prime (20351340323) 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, 302414 + ... + 363533.

It is an arithmetic number, because the mean of its divisors is an integer number (1006913376).

Almost surely, 2^20351340320 is an apocalyptic number.

20351340320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20351340320 is an abundant number, since it is smaller than the sum of its proper divisors (27980501728).

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

20351340320 is a wasteful number, since it uses less digits than its factorization.

20351340320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666153 (or 666145 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

Adding to 20351340320 its reverse (2304315302), we get a palindrome (22655655622).

The spelling of 20351340320 in words is "twenty billion, three hundred fifty-one million, three hundred forty thousand, three hundred twenty".