20445309256880 has 40 divisors (see below), whose sum is σ = 48069449028000. Its totient is φ = 8086234669568.

The previous prime is 20445309256877. The next prime is 20445309256903. The reversal of 20445309256880 is 8865290354402.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1435758980 + ... + 1435773219.

It is an arithmetic number, because the mean of its divisors is an integer number (1201736225700).

Almost surely, 2^{20445309256880} is an apocalyptic number.

20445309256880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20445309256880 is an abundant number, since it is smaller than the sum of its proper divisors (27624139771120).

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

20445309256880 is a wasteful number, since it uses less digits than its factorization.

20445309256880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2871532301 (or 2871532295 counting only the distinct ones).

The product of its (nonzero) digits is 16588800, while the sum is 56.

The spelling of 20445309256880 in words is "twenty trillion, four hundred forty-five billion, three hundred nine million, two hundred fifty-six thousand, eight hundred eighty".