20001301320 has 512 divisors, whose sum is σ = 80994816000. Its totient is φ = 3815976960.

The previous prime is 20001301301. The next prime is 20001301337. The reversal of 20001301320 is 2310310002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20001301296 and 20001301305.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 32311971 + ... + 32312589.

It is an arithmetic number, because the mean of its divisors is an integer number (158193000).

Almost surely, 2^20001301320 is an apocalyptic number.

20001301320 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 20001301320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40497408000).

20001301320 is an abundant number, since it is smaller than the sum of its proper divisors (60993514680).

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

20001301320 is a wasteful number, since it uses less digits than its factorization.

20001301320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933 (or 929 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 20001301320 its reverse (2310310002), we get a palindrome (22311611322).

The spelling of 20001301320 in words is "twenty billion, one million, three hundred one thousand, three hundred twenty".