20302003021 has 4 divisors (see below), whose sum is σ = 20368133632. Its totient is φ = 20235872412.

The previous prime is 20302003003. The next prime is 20302003027. The reversal of 20302003021 is 12030020302.

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 not a de Polignac number, because 20302003021 - 2⁷ = 20302002893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20302002992 and 20302003010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20302003027) 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, 33064845 + ... + 33065458.

It is an arithmetic number, because the mean of its divisors is an integer number (5092033408).

Almost surely, 2^20302003021 is an apocalyptic number.

It is an amenable number.

20302003021 is a deficient number, since it is larger than the sum of its proper divisors (66130611).

20302003021 is an equidigital number, since it uses as much as digits as its factorization.

20302003021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66130610.

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

Adding to 20302003021 its reverse (12030020302), we get a palindrome (32332023323).

The spelling of 20302003021 in words is "twenty billion, three hundred two million, three thousand, twenty-one".