20452797456 has 320 divisors, whose sum is σ = 69628876800. Its totient is φ = 5022425088.

The previous prime is 20452797439. The next prime is 20452797487. The reversal of 20452797456 is 65479725402.

It is a junction number, because it is equal to n+sod(n) for n = 20452797399 and 20452797408.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 4894440 + ... + 4898616.

It is an arithmetic number, because the mean of its divisors is an integer number (217590240).

Almost surely, 2^20452797456 is an apocalyptic number.

20452797456 is a gapful number since it is divisible by the number (26) 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 20452797456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34814438400).

20452797456 is an abundant number, since it is smaller than the sum of its proper divisors (49176079344).

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

20452797456 is a wasteful number, since it uses less digits than its factorization.

20452797456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4286 (or 4280 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 51.

The spelling of 20452797456 in words is "twenty billion, four hundred fifty-two million, seven hundred ninety-seven thousand, four hundred fifty-six".