20789423496 has 128 divisors (see below), whose sum is σ = 61267968000. Its totient is φ = 6513224256.

The previous prime is 20789423419. The next prime is 20789423497. The reversal of 20789423496 is 69432498702.

20789423496 is a `hidden beast` number, since 207 + 8 + 9 + 423 + 4 + 9 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (20789423497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 501265 + ... + 541151.

It is an arithmetic number, because the mean of its divisors is an integer number (478656000).

Almost surely, 2^20789423496 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20789423496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30633984000).

20789423496 is an abundant number, since it is smaller than the sum of its proper divisors (40478544504).

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

20789423496 is a wasteful number, since it uses less digits than its factorization.

20789423496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40048 (or 40038 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 20789423496 in words is "twenty billion, seven hundred eighty-nine million, four hundred twenty-three thousand, four hundred ninety-six".