20321202120 has 32 divisors (see below), whose sum is σ = 60963606720. Its totient is φ = 5418987200.

The previous prime is 20321202089. The next prime is 20321202137. The reversal of 20321202120 is 2120212302.

It is a happy number.

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 20321202120.

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, 84671556 + ... + 84671795.

It is an arithmetic number, because the mean of its divisors is an integer number (1905112710).

Almost surely, 2^20321202120 is an apocalyptic number.

20321202120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20321202120 is an abundant number, since it is smaller than the sum of its proper divisors (40642404600).

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

20321202120 is a wasteful number, since it uses less digits than its factorization.

20321202120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169343365 (or 169343361 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20321202120 its reverse (2120212302), we get a palindrome (22441414422).

The spelling of 20321202120 in words is "twenty billion, three hundred twenty-one million, two hundred two thousand, one hundred twenty".