20423120432 has 40 divisors (see below), whose sum is σ = 46487597520. Its totient is φ = 8569140480.

The previous prime is 20423120423. The next prime is 20423120477. The reversal of 20423120432 is 23402132402.

It is a junction number, because it is equal to n+sod(n) for n = 20423120398 and 20423120407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4460807 + ... + 4465382.

It is an arithmetic number, because the mean of its divisors is an integer number (1162189938).

Almost surely, 2^20423120432 is an apocalyptic number.

20423120432 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20423120432 is an abundant number, since it is smaller than the sum of its proper divisors (26064477088).

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

20423120432 is a wasteful number, since it uses less digits than its factorization.

20423120432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8926221 (or 8926215 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 20423120432 its reverse (23402132402), we get a palindrome (43825252834).

The spelling of 20423120432 in words is "twenty billion, four hundred twenty-three million, one hundred twenty thousand, four hundred thirty-two".