20210421423043 has 4 divisors (see below), whose sum is σ = 20210433522048. Its totient is φ = 20210409324040.

The previous prime is 20210421423029. The next prime is 20210421423083. The reversal of 20210421423043 is 34032412401202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20210421423043 - 2⁹ = 20210421422531 is a prime.

It is a super-2 number, since 2×20210421423043² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20210421423083) 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, 3047203 + ... + 7050268.

It is an arithmetic number, because the mean of its divisors is an integer number (5052608380512).

Almost surely, 2^{20210421423043} is an apocalyptic number.

20210421423043 is a deficient number, since it is larger than the sum of its proper divisors (12099005).

20210421423043 is a wasteful number, since it uses less digits than its factorization.

20210421423043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12099004.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 20210421423043 its reverse (34032412401202), we get a palindrome (54242833824245).

The spelling of 20210421423043 in words is "twenty trillion, two hundred ten billion, four hundred twenty-one million, four hundred twenty-three thousand, forty-three".