20454832320 has 448 divisors, whose sum is σ = 72078470016. Its totient is φ = 4883742720.

The previous prime is 20454832319. The next prime is 20454832339. The reversal of 20454832320 is 2323845402.

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, 73844022 + ... + 73844298.

It is an arithmetic number, because the mean of its divisors is an integer number (160889442).

Almost surely, 2^20454832320 is an apocalyptic number.

20454832320 is a gapful number since it is divisible by the number (20) 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 20454832320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36039235008).

20454832320 is an abundant number, since it is smaller than the sum of its proper divisors (51623637696).

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

20454832320 is a wasteful number, since it uses less digits than its factorization.

20454832320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468 (or 458 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 33.

The spelling of 20454832320 in words is "twenty billion, four hundred fifty-four million, eight hundred thirty-two thousand, three hundred twenty".