20423364444 has 108 divisors (see below), whose sum is σ = 60605945400. Its totient is φ = 5781658176.

The previous prime is 20423364407. The next prime is 20423364469. The reversal of 20423364444 is 44446332402.

20423364444 is a `hidden beast` number, since 2 + 0 + 4 + 2 + 3 + 3 + 644 + 4 + 4 = 666.

It is a super-2 number, since 2×20423364444² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20423364399 and 20423364408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 139167 + ... + 245385.

Almost surely, 2^20423364444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20423364444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30302972700).

20423364444 is an abundant number, since it is smaller than the sum of its proper divisors (40182580956).

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

20423364444 is a wasteful number, since it uses less digits than its factorization.

20423364444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106352 (or 106340 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 36.

Adding to 20423364444 its reverse (44446332402), we get a palindrome (64869696846).

The spelling of 20423364444 in words is "twenty billion, four hundred twenty-three million, three hundred sixty-four thousand, four hundred forty-four".