20423443224 has 32 divisors (see below), whose sum is σ = 52438572720. Its totient is φ = 6623819136.

The previous prime is 20423443213. The next prime is 20423443231. The reversal of 20423443224 is 42234432402.

It is a junction number, because it is equal to n+sod(n) for n = 20423443191 and 20423443200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11498799 + ... + 11500574.

Almost surely, 2^20423443224 is an apocalyptic number.

20423443224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20423443224 is an abundant number, since it is smaller than the sum of its proper divisors (32015129496).

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

20423443224 is a wasteful number, since it uses less digits than its factorization.

20423443224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22999419 (or 22999415 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 30.

Adding to 20423443224 its reverse (42234432402), we get a palindrome (62657875626).

The spelling of 20423443224 in words is "twenty billion, four hundred twenty-three million, four hundred forty-three thousand, two hundred twenty-four".