20323143444 has 12 divisors (see below), whose sum is σ = 47420668064. Its totient is φ = 6774381144.

The previous prime is 20323143431. The next prime is 20323143469. The reversal of 20323143444 is 44434132302.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×20323143444² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 846797632 + ... + 846797655.

Almost surely, 2^20323143444 is an apocalyptic number.

It is an amenable number.

20323143444 is an abundant number, since it is smaller than the sum of its proper divisors (27097524620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20323143444 is a wasteful number, since it uses less digits than its factorization.

20323143444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693595294 (or 1693595292 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 20323143444 its reverse (44434132302), we get a palindrome (64757275746).

The spelling of 20323143444 in words is "twenty billion, three hundred twenty-three million, one hundred forty-three thousand, four hundred forty-four".