21404476111266 has 48 divisors (see below), whose sum is σ = 48891622800384. Its totient is φ = 6754258697472.

The previous prime is 21404476111253. The next prime is 21404476111297. The reversal of 21404476111266 is 66211167440412.

21404476111266 is a `hidden beast` number, since 2 + 1 + 4 + 0 + 4 + 4 + 7 + 611 + 1 + 26 + 6 = 666.

It is a super-2 number, since 2×21404476111266² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 266463106 + ... + 266543421.

It is an arithmetic number, because the mean of its divisors is an integer number (1018575475008).

Almost surely, 2^{21404476111266} is an apocalyptic number.

21404476111266 is an abundant number, since it is smaller than the sum of its proper divisors (27487146689118).

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

21404476111266 is a wasteful number, since it uses less digits than its factorization.

21404476111266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533006655 (or 533006652 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 21404476111266 in words is "twenty-one trillion, four hundred four billion, four hundred seventy-six million, one hundred eleven thousand, two hundred sixty-six".