21323821054248 has 24 divisors (see below), whose sum is σ = 57752015355450. Its totient is φ = 7107940351392.

The previous prime is 21323821054247. The next prime is 21323821054313. The reversal of 21323821054248 is 84245012832312.

21323821054248 is a `hidden beast` number, since 2 + 1 + 3 + 2 + 3 + 8 + 210 + 5 + 424 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 21301898698404 + 21922355844 = 4615398^2 + 148062^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (21323821054247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 148082090583 + ... + 148082090726.

Almost surely, 2^{21323821054248} is an apocalyptic number.

It is an amenable number.

21323821054248 is an abundant number, since it is smaller than the sum of its proper divisors (36428194301202).

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

21323821054248 is a wasteful number, since it uses less digits than its factorization.

21323821054248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296164181321 (or 296164181314 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 45.

The spelling of 21323821054248 in words is "twenty-one trillion, three hundred twenty-three billion, eight hundred twenty-one million, fifty-four thousand, two hundred forty-eight".