21768703004048 has 160 divisors (see below), whose sum is σ = 56682390761472. Its totient is φ = 7821533145600.

The previous prime is 21768703004033. The next prime is 21768703004051. The reversal of 21768703004048 is 84040030786712.

It is a junction number, because it is equal to n+sod(n) for n = 21768703003987 and 21768703004005.

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, 16385693 + ... + 17664323.

Almost surely, 2^{21768703004048} is an apocalyptic number.

21768703004048 is a gapful number since it is divisible by the number (28) 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 21768703004048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28341195380736).

21768703004048 is an abundant number, since it is smaller than the sum of its proper divisors (34913687757424).

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

21768703004048 is a wasteful number, since it uses less digits than its factorization.

21768703004048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279733 (or 1279727 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 50.

The spelling of 21768703004048 in words is "twenty-one trillion, seven hundred sixty-eight billion, seven hundred three million, four thousand, forty-eight".