20004301000021 has 8 divisors (see below), whose sum is σ = 21543139102520. Its totient is φ = 18465469428672.

The previous prime is 20004301000003. The next prime is 20004301000031. The reversal of 20004301000021 is 12000010340002.

It can be written as a sum of positive squares in 4 ways, for example, as 113494872100 + 19890806127921 = 336890^2 + 4459911^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20004301000021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20004300999965 and 20004301000010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20004301000031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6076975 + ... + 8771443.

It is an arithmetic number, because the mean of its divisors is an integer number (2692892387815).

Almost surely, 2^{20004301000021} is an apocalyptic number.

It is an amenable number.

20004301000021 is a deficient number, since it is larger than the sum of its proper divisors (1538838102499).

20004301000021 is a wasteful number, since it uses less digits than its factorization.

20004301000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3265575.

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

Adding to 20004301000021 its reverse (12000010340002), we get a palindrome (32004311340023).

The spelling of 20004301000021 in words is "twenty trillion, four billion, three hundred one million, twenty-one", and thus it is an aban number.