20002121320 has 32 divisors (see below), whose sum is σ = 46456542720. Its totient is φ = 7742756160.

The previous prime is 20002121287. The next prime is 20002121371. The reversal of 20002121320 is 2312120002.

It is a self number, because there is not a number n which added to its sum of digits gives 20002121320.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8064132 + ... + 8066611.

It is an arithmetic number, because the mean of its divisors is an integer number (1451766960).

Almost surely, 2^20002121320 is an apocalyptic number.

20002121320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20002121320 is an abundant number, since it is smaller than the sum of its proper divisors (26454421400).

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

20002121320 is a wasteful number, since it uses less digits than its factorization.

20002121320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16130785 (or 16130781 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20002121320 its reverse (2312120002), we get a palindrome (22314241322).

The spelling of 20002121320 in words is "twenty billion, two million, one hundred twenty-one thousand, three hundred twenty".