20200130021 has 4 divisors (see below), whose sum is σ = 20286826092. Its totient is φ = 20113433952.

The previous prime is 20200129967. The next prime is 20200130023. The reversal of 20200130021 is 12003100202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12003100202 = 2 ⋅6001550101.

It can be written as a sum of positive squares in 2 ways, for example, as 8508033121 + 11692096900 = 92239^2 + 108130^2 .

It is a cyclic number.

It is not a de Polignac number, because 20200130021 - 2²² = 20195935717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20200129984 and 20200130011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200130023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43347686 + ... + 43348151.

It is an arithmetic number, because the mean of its divisors is an integer number (5071706523).

Almost surely, 2^20200130021 is an apocalyptic number.

It is an amenable number.

20200130021 is a deficient number, since it is larger than the sum of its proper divisors (86696071).

20200130021 is an equidigital number, since it uses as much as digits as its factorization.

20200130021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86696070.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 20200130021 its reverse (12003100202), we get a palindrome (32203230223).

The spelling of 20200130021 in words is "twenty billion, two hundred million, one hundred thirty thousand, twenty-one".