20004323430 has 128 divisors (see below), whose sum is σ = 60687019008. Its totient is φ = 4106598912.

The previous prime is 20004323399. The next prime is 20004323447. The reversal of 20004323430 is 3432340002.

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

It is a junction number, because it is equal to n+sod(n) for n = 20004323397 and 20004323406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1989 + ... + 200031.

It is an arithmetic number, because the mean of its divisors is an integer number (474117336).

Almost surely, 2^20004323430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20004323430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30343509504).

20004323430 is an abundant number, since it is smaller than the sum of its proper divisors (40682695578).

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

20004323430 is a wasteful number, since it uses less digits than its factorization.

20004323430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198110.

The product of its (nonzero) digits is 1728, while the sum is 21.

Adding to 20004323430 its reverse (3432340002), we get a palindrome (23436663432).

The spelling of 20004323430 in words is "twenty billion, four million, three hundred twenty-three thousand, four hundred thirty".