20842884648456 has 64 divisors (see below), whose sum is σ = 56156690862720. Its totient is φ = 6408483025920.

The previous prime is 20842884648427. The next prime is 20842884648457. The reversal of 20842884648456 is 65484648824802.

It is not an unprimeable number, because it can be changed into a prime (20842884648457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24117660 + ... + 24966923.

It is an arithmetic number, because the mean of its divisors is an integer number (877448294730).

Almost surely, 2^{20842884648456} is an apocalyptic number.

20842884648456 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20842884648456 is an abundant number, since it is smaller than the sum of its proper divisors (35313806214264).

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

20842884648456 is a wasteful number, since it uses less digits than its factorization.

20842884648456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49085966 (or 49085962 counting only the distinct ones).

The product of its (nonzero) digits is 754974720, while the sum is 69.

The spelling of 20842884648456 in words is "twenty trillion, eight hundred forty-two billion, eight hundred eighty-four million, six hundred forty-eight thousand, four hundred fifty-six".