20328719904 has 192 divisors, whose sum is σ = 61307326080. Its totient is φ = 6549258240.

The previous prime is 20328719897. The next prime is 20328719921. The reversal of 20328719904 is 40991782302.

It is a self number, because there is not a number n which added to its sum of digits gives 20328719904.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3600924 + ... + 3606564.

It is an arithmetic number, because the mean of its divisors is an integer number (319308990).

Almost surely, 2^20328719904 is an apocalyptic number.

20328719904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20328719904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30653663040).

20328719904 is an abundant number, since it is smaller than the sum of its proper divisors (40978606176).

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

20328719904 is a wasteful number, since it uses less digits than its factorization.

20328719904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5800 (or 5786 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 20328719904 in words is "twenty billion, three hundred twenty-eight million, seven hundred nineteen thousand, nine hundred four".