20430403404 has 12 divisors (see below), whose sum is σ = 47670941304. Its totient is φ = 6810134464.

The previous prime is 20430403397. The next prime is 20430403421. The reversal of 20430403404 is 40430403402.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 851266797 + ... + 851266820.

It is an arithmetic number, because the mean of its divisors is an integer number (3972578442).

Almost surely, 2^20430403404 is an apocalyptic number.

It is an amenable number.

20430403404 is an abundant number, since it is smaller than the sum of its proper divisors (27240537900).

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

20430403404 is a wasteful number, since it uses less digits than its factorization.

20430403404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1702533624 (or 1702533622 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 24.

Adding to 20430403404 its reverse (40430403402), we get a palindrome (60860806806).

The spelling of 20430403404 in words is "twenty billion, four hundred thirty million, four hundred three thousand, four hundred four".