20404505430 has 96 divisors (see below), whose sum is σ = 55416104640. Its totient is φ = 5199194880.

The previous prime is 20404505423. The next prime is 20404505437. The reversal of 20404505430 is 3450540402.

20404505430 is a `hidden beast` number, since 204 + 0 + 450 + 5 + 4 + 3 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (20404505423) and next prime (20404505437).

It is a junction number, because it is equal to n+sod(n) for n = 20404505394 and 20404505403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20404505437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2208220 + ... + 2217440.

It is an arithmetic number, because the mean of its divisors is an integer number (577251090).

Almost surely, 2^20404505430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20404505430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27708052320).

20404505430 is an abundant number, since it is smaller than the sum of its proper divisors (35011599210).

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

20404505430 is a wasteful number, since it uses less digits than its factorization.

20404505430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10326 (or 10323 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The spelling of 20404505430 in words is "twenty billion, four hundred four million, five hundred five thousand, four hundred thirty".