20211310320 has 40 divisors (see below), whose sum is σ = 62655062736. Its totient is φ = 5389682688.

The previous prime is 20211310213. The next prime is 20211310337. The reversal of 20211310320 is 2301311202.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20211310320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42106657 + ... + 42107136.

Almost surely, 2^20211310320 is an apocalyptic number.

20211310320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211310320 is an abundant number, since it is smaller than the sum of its proper divisors (42443752416).

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

20211310320 is a wasteful number, since it uses less digits than its factorization.

20211310320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84213809 (or 84213803 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20211310320 its reverse (2301311202), we get a palindrome (22512621522).

The spelling of 20211310320 in words is "twenty billion, two hundred eleven million, three hundred ten thousand, three hundred twenty".