20347320264 has 256 divisors, whose sum is σ = 56827008000. Its totient is φ = 6044712960.

The previous prime is 20347320263. The next prime is 20347320289. The reversal of 20347320264 is 46202374302.

It is not an unprimeable number, because it can be changed into a prime (20347320263) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 117614482 + ... + 117614654.

It is an arithmetic number, because the mean of its divisors is an integer number (221980500).

Almost surely, 2^20347320264 is an apocalyptic number.

20347320264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20347320264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28413504000).

20347320264 is an abundant number, since it is smaller than the sum of its proper divisors (36479687736).

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

20347320264 is a wasteful number, since it uses less digits than its factorization.

20347320264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408 (or 404 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 33.

Adding to 20347320264 its reverse (46202374302), we get a palindrome (66549694566).

The spelling of 20347320264 in words is "twenty billion, three hundred forty-seven million, three hundred twenty thousand, two hundred sixty-four".