21376113403266 has 48 divisors (see below), whose sum is σ = 46447040502720. Its totient is φ = 7105046398560.

The previous prime is 21376113403243. The next prime is 21376113403289. The reversal of 21376113403266 is 66230431167312.

21376113403266 is a `hidden beast` number, since 2 + 1 + 3 + 7 + 611 + 3 + 4 + 0 + 3 + 26 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (21376113403243) and next prime (21376113403289).

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 in 23 ways as a sum of consecutive naturals, for example, 103683201 + ... + 103889163.

It is an arithmetic number, because the mean of its divisors is an integer number (967646677140).

Almost surely, 2^{21376113403266} is an apocalyptic number.

21376113403266 is an abundant number, since it is smaller than the sum of its proper divisors (25070927099454).

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

21376113403266 is a wasteful number, since it uses less digits than its factorization.

21376113403266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222391 (or 222388 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 45.

The spelling of 21376113403266 in words is "twenty-one trillion, three hundred seventy-six billion, one hundred thirteen million, four hundred three thousand, two hundred sixty-six".