21366472757103 has 12 divisors (see below), whose sum is σ = 30876284788440. Its totient is φ = 14238037363536.

The previous prime is 21366472757099. The next prime is 21366472757141. The reversal of 21366472757103 is 30175727466312.

21366472757103 is a `hidden beast` number, since 2 + 1 + 3 + 6 + 6 + 47 + 27 + 571 + 0 + 3 = 666.

It is not a de Polignac number, because 21366472757103 - 2² = 21366472757099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21366472757103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21366472557103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 523129101 + ... + 523169942.

It is an arithmetic number, because the mean of its divisors is an integer number (2573023732370).

Almost surely, 2^{21366472757103} is an apocalyptic number.

21366472757103 is a deficient number, since it is larger than the sum of its proper divisors (9509812031337).

21366472757103 is a wasteful number, since it uses less digits than its factorization.

21366472757103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046301318 (or 1046301315 counting only the distinct ones).

The product of its (nonzero) digits is 8890560, while the sum is 54.

The spelling of 21366472757103 in words is "twenty-one trillion, three hundred sixty-six billion, four hundred seventy-two million, seven hundred fifty-seven thousand, one hundred three".