20720448464450 has 48 divisors (see below), whose sum is σ = 44213227850880. Its totient is φ = 7077141736320.

The previous prime is 20720448464381. The next prime is 20720448464459. The reversal of 20720448464450 is 5446484402702.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20720448464459) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 112457915 + ... + 112642014.

It is an arithmetic number, because the mean of its divisors is an integer number (921108913560).

Almost surely, 2^{20720448464450} is an apocalyptic number.

20720448464450 is an abundant number, since it is smaller than the sum of its proper divisors (23492779386430).

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

20720448464450 is a wasteful number, since it uses less digits than its factorization.

20720448464450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225100211 (or 225100206 counting only the distinct ones).

The product of its (nonzero) digits is 6881280, while the sum is 50.

The spelling of 20720448464450 in words is "twenty trillion, seven hundred twenty billion, four hundred forty-eight million, four hundred sixty-four thousand, four hundred fifty".