20404430004 has 48 divisors (see below), whose sum is σ = 55677214208. Its totient is φ = 5694258528.

The previous prime is 20404429999. The next prime is 20404430017. The reversal of 20404430004 is 40003440402.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2820922 + ... + 2828145.

Almost surely, 2^20404430004 is an apocalyptic number.

It is an amenable number.

20404430004 is an abundant number, since it is smaller than the sum of its proper divisors (35272784204).

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

20404430004 is a wasteful number, since it uses less digits than its factorization.

20404430004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5649124 (or 5649122 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

Adding to 20404430004 its reverse (40003440402), we get a palindrome (60407870406).

The spelling of 20404430004 in words is "twenty billion, four hundred four million, four hundred thirty thousand, four".