20300203021 has 4 divisors (see below), whose sum is σ = 23200232032. Its totient is φ = 17400174012.

The previous prime is 20300202943. The next prime is 20300203043. The reversal of 20300203021 is 12030200302.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20300203021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20300202992 and 20300203010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20300203051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1450014495 + ... + 1450014508.

It is an arithmetic number, because the mean of its divisors is an integer number (5800058008).

Almost surely, 2^20300203021 is an apocalyptic number.

It is an amenable number.

20300203021 is a deficient number, since it is larger than the sum of its proper divisors (2900029011).

20300203021 is an equidigital number, since it uses as much as digits as its factorization.

20300203021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2900029010.

The product of its (nonzero) digits is 72, while the sum is 13.

Adding to 20300203021 its reverse (12030200302), we get a palindrome (32330403323).

The spelling of 20300203021 in words is "twenty billion, three hundred million, two hundred three thousand, twenty-one".