20423331323443 has 4 divisors (see below), whose sum is σ = 20438957439000. Its totient is φ = 20407705207888.

The previous prime is 20423331323419. The next prime is 20423331323449. The reversal of 20423331323443 is 34432313332402.

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 20423331323443 - 2¹³ = 20423331315251 is a prime.

It is a super-2 number, since 2×20423331323443² (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 (20423331323449) 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, 7813055818 + ... + 7813058431.

It is an arithmetic number, because the mean of its divisors is an integer number (5109739359750).

Almost surely, 2^{20423331323443} is an apocalyptic number.

20423331323443 is a deficient number, since it is larger than the sum of its proper divisors (15626115557).

20423331323443 is a wasteful number, since it uses less digits than its factorization.

20423331323443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15626115556.

The product of its (nonzero) digits is 373248, while the sum is 37.

Adding to 20423331323443 its reverse (34432313332402), we get a palindrome (54855644655845).

The spelling of 20423331323443 in words is "twenty trillion, four hundred twenty-three billion, three hundred thirty-one million, three hundred twenty-three thousand, four hundred forty-three".