20121424432 has 10 divisors (see below), whose sum is σ = 38985259868. Its totient is φ = 10060712208.

The previous prime is 20121424391. The next prime is 20121424481. The reversal of 20121424432 is 23442412102.

It is a junction number, because it is equal to n+sod(n) for n = 20121424397 and 20121424406.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628794498 + ... + 628794529.

Almost surely, 2^20121424432 is an apocalyptic number.

It is an amenable number.

20121424432 is a deficient number, since it is larger than the sum of its proper divisors (18863835436).

20121424432 is a wasteful number, since it uses less digits than its factorization.

20121424432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257589035 (or 1257589029 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 20121424432 its reverse (23442412102), we get a palindrome (43563836534).

The spelling of 20121424432 in words is "twenty billion, one hundred twenty-one million, four hundred twenty-four thousand, four hundred thirty-two".