20559776207480 has 128 divisors (see below), whose sum is σ = 50179636080000. Its totient is φ = 7550713282560.

The previous prime is 20559776207461. The next prime is 20559776207513. The reversal of 20559776207480 is 8470267795502.

It is a congruent number.

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, 422329781 + ... + 422378459.

It is an arithmetic number, because the mean of its divisors is an integer number (392028406875).

Almost surely, 2^{20559776207480} is an apocalyptic number.

20559776207480 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 20559776207480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25089818040000).

20559776207480 is an abundant number, since it is smaller than the sum of its proper divisors (29619859872520).

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

20559776207480 is a wasteful number, since it uses less digits than its factorization.

20559776207480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63897 (or 63893 counting only the distinct ones).

The product of its (nonzero) digits is 59270400, while the sum is 62.

The spelling of 20559776207480 in words is "twenty trillion, five hundred fifty-nine billion, seven hundred seventy-six million, two hundred seven thousand, four hundred eighty".