20300021001 has 24 divisors (see below), whose sum is σ = 31610309640. Its totient is φ = 12479463936.

The previous prime is 20300020991. The next prime is 20300021023. The reversal of 20300021001 is 10012000302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1173131001 + 19126890000 = 34251^2 + 138300^2 .

It is not a de Polignac number, because 20300021001 - 2²⁵ = 20266466569 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20300021041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25515 + ... + 203103.

It is an arithmetic number, because the mean of its divisors is an integer number (1317096235).

Almost surely, 2^20300021001 is an apocalyptic number.

It is an amenable number.

20300021001 is a deficient number, since it is larger than the sum of its proper divisors (11310288639).

20300021001 is a wasteful number, since it uses less digits than its factorization.

20300021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178585 (or 178582 counting only the distinct ones).

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

Adding to 20300021001 its reverse (10012000302), we get a palindrome (30312021303).

The spelling of 20300021001 in words is "twenty billion, three hundred million, twenty-one thousand, one".