20021000130 has 96 divisors (see below), whose sum is σ = 55186769664. Its totient is φ = 5018485248.

The previous prime is 20021000117. The next prime is 20021000161. The reversal of 20021000130 is 3100012002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1257399 + ... + 1273221.

It is an arithmetic number, because the mean of its divisors is an integer number (574862184).

Almost surely, 2^20021000130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20021000130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27593384832).

20021000130 is an abundant number, since it is smaller than the sum of its proper divisors (35165769534).

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

20021000130 is a wasteful number, since it uses less digits than its factorization.

20021000130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16680 (or 16677 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 20021000130 its reverse (3100012002), we get a palindrome (23121012132).

The spelling of 20021000130 in words is "twenty billion, twenty-one million, one hundred thirty", and thus it is an aban number.