21454276305 has 32 divisors (see below), whose sum is σ = 42797104128. Its totient is φ = 8916062400.

The previous prime is 21454276247. The next prime is 21454276321. The reversal of 21454276305 is 50367245412.

It is not a de Polignac number, because 21454276305 - 2⁷ = 21454276177 is a prime.

It is a Curzon 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 in 31 ways as a sum of consecutive naturals, for example, 9286411 + ... + 9288720.

It is an arithmetic number, because the mean of its divisors is an integer number (1337409504).

Almost surely, 2^21454276305 is an apocalyptic number.

It is an amenable number.

21454276305 is a deficient number, since it is larger than the sum of its proper divisors (21342827823).

21454276305 is a wasteful number, since it uses less digits than its factorization.

21454276305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18575157.

The product of its (nonzero) digits is 201600, while the sum is 39.

The spelling of 21454276305 in words is "twenty-one billion, four hundred fifty-four million, two hundred seventy-six thousand, three hundred five".