20211210320 has 120 divisors (see below), whose sum is σ = 54852754824. Its totient is φ = 6905515008.

The previous prime is 20211210311. The next prime is 20211210389. The reversal of 20211210320 is 2301211202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1594245184 + 18616965136 = 39928^2 + 136444^2 .

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 20211210295 and 20211210304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1139762 + ... + 1157358.

Almost surely, 2^20211210320 is an apocalyptic number.

20211210320 is a gapful number since it is divisible by the number (20) 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 20211210320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27426377412).

20211210320 is an abundant number, since it is smaller than the sum of its proper divisors (34641544504).

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

20211210320 is a wasteful number, since it uses less digits than its factorization.

20211210320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17917 (or 17904 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20211210320 its reverse (2301211202), we get a palindrome (22512421522).

The spelling of 20211210320 in words is "twenty billion, two hundred eleven million, two hundred ten thousand, three hundred twenty".