20354478543280 has 160 divisors (see below), whose sum is σ = 54425011576320. Its totient is φ = 6934912174080.

The previous prime is 20354478543247. The next prime is 20354478543293. The reversal of 20354478543280 is 8234587445302.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56726676 + ... + 57084364.

It is an arithmetic number, because the mean of its divisors is an integer number (340156322352).

Almost surely, 2^{20354478543280} is an apocalyptic number.

20354478543280 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 20354478543280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27212505788160).

20354478543280 is an abundant number, since it is smaller than the sum of its proper divisors (34070533033040).

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

20354478543280 is a wasteful number, since it uses less digits than its factorization.

20354478543280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358347 (or 358341 counting only the distinct ones).

The product of its (nonzero) digits is 25804800, while the sum is 55.

The spelling of 20354478543280 in words is "twenty trillion, three hundred fifty-four billion, four hundred seventy-eight million, five hundred forty-three thousand, two hundred eighty".