21450446111265 has 16 divisors (see below), whose sum is σ = 34320970857600. Its totient is φ = 11440152232832.

The previous prime is 21450446111233. The next prime is 21450446111273. The reversal of 21450446111265 is 56211164405412.

It is a cyclic number.

It is not a de Polignac number, because 21450446111265 - 2⁵ = 21450446111233 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3260085 + ... + 7316354.

It is an arithmetic number, because the mean of its divisors is an integer number (2145060678600).

Almost surely, 2^{21450446111265} is an apocalyptic number.

It is an amenable number.

21450446111265 is a deficient number, since it is larger than the sum of its proper divisors (12870524746335).

21450446111265 is a wasteful number, since it uses less digits than its factorization.

21450446111265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10711656.

The product of its (nonzero) digits is 230400, while the sum is 42.

The spelling of 21450446111265 in words is "twenty-one trillion, four hundred fifty billion, four hundred forty-six million, one hundred eleven thousand, two hundred sixty-five".