20210320423 has 4 divisors (see below), whose sum is σ = 20312911080. Its totient is φ = 20107729768.

The previous prime is 20210320411. The next prime is 20210320441. The reversal of 20210320423 is 32402301202.

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 20210320423 - 2¹³ = 20210312231 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20210320423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210321423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51295033 + ... + 51295426.

It is an arithmetic number, because the mean of its divisors is an integer number (5078227770).

Almost surely, 2^20210320423 is an apocalyptic number.

20210320423 is a deficient number, since it is larger than the sum of its proper divisors (102590657).

20210320423 is a wasteful number, since it uses less digits than its factorization.

20210320423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102590656.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 20210320423 its reverse (32402301202), we get a palindrome (52612621625).

The spelling of 20210320423 in words is "twenty billion, two hundred ten million, three hundred twenty thousand, four hundred twenty-three".