20424440432 has 40 divisors (see below), whose sum is σ = 43178121840. Its totient is φ = 9282055680.

The previous prime is 20424440419. The next prime is 20424440471. The reversal of 20424440432 is 23404442402.

It is a junction number, because it is equal to n+sod(n) for n = 20424440395 and 20424440404.

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, 1458938 + ... + 1472870.

It is an arithmetic number, because the mean of its divisors is an integer number (1079453046).

Almost surely, 2^20424440432 is an apocalyptic number.

20424440432 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20424440432 is an abundant number, since it is smaller than the sum of its proper divisors (22753681408).

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

20424440432 is a wasteful number, since it uses less digits than its factorization.

20424440432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22281 (or 22275 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 29.

Adding to 20424440432 its reverse (23404442402), we get a palindrome (43828882834).

The spelling of 20424440432 in words is "twenty billion, four hundred twenty-four million, four hundred forty thousand, four hundred thirty-two".