21374336147552 has 12 divisors (see below), whose sum is σ = 42080724290556. Its totient is φ = 10687168073760.

The previous prime is 21374336147533. The next prime is 21374336147569. The reversal of 21374336147552 is 25574163347312.

It is a junction number, because it is equal to n+sod(n) for n = 21374336147494 and 21374336147503.

It is a congruent 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 as a sum of consecutive naturals, namely, 333974002274 + ... + 333974002337.

It is an arithmetic number, because the mean of its divisors is an integer number (3506727024213).

Almost surely, 2^{21374336147552} is an apocalyptic number.

It is an amenable number.

21374336147552 is a deficient number, since it is larger than the sum of its proper divisors (20706388143004).

21374336147552 is an equidigital number, since it uses as much as digits as its factorization.

21374336147552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667948004621 (or 667948004613 counting only the distinct ones).

The product of its digits is 12700800, while the sum is 53.

The spelling of 21374336147552 in words is "twenty-one trillion, three hundred seventy-four billion, three hundred thirty-six million, one hundred forty-seven thousand, five hundred fifty-two".