20321307270 has 128 divisors (see below), whose sum is σ = 59549230080. Its totient is φ = 4890320640.

The previous prime is 20321307247. The next prime is 20321307287. The reversal of 20321307270 is 7270312302.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 381919 + ... + 431861.

It is an arithmetic number, because the mean of its divisors is an integer number (465228360).

Almost surely, 2^20321307270 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20321307270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29774615040).

20321307270 is an abundant number, since it is smaller than the sum of its proper divisors (39227922810).

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

20321307270 is a wasteful number, since it uses less digits than its factorization.

20321307270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50107 (or 50101 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

Adding to 20321307270 its reverse (7270312302), we get a palindrome (27591619572).

The spelling of 20321307270 in words is "twenty billion, three hundred twenty-one million, three hundred seven thousand, two hundred seventy".