20041430021 has 4 divisors (see below), whose sum is σ = 20161438752. Its totient is φ = 19921421292.

The previous prime is 20041430011. The next prime is 20041430063. The reversal of 20041430021 is 12003414002.

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 20041430021 - 2¹⁰ = 20041428997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20041430011) 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, 60004115 + ... + 60004448.

It is an arithmetic number, because the mean of its divisors is an integer number (5040359688).

Almost surely, 2^20041430021 is an apocalyptic number.

It is an amenable number.

20041430021 is a deficient number, since it is larger than the sum of its proper divisors (120008731).

20041430021 is a wasteful number, since it uses less digits than its factorization.

20041430021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120008730.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20041430021 its reverse (12003414002), we get a palindrome (32044844023).

The spelling of 20041430021 in words is "twenty billion, forty-one million, four hundred thirty thousand, twenty-one".