21450611105473 has 32 divisors (see below), whose sum is σ = 24885978670080. Its totient is φ = 18284081400000.

The previous prime is 21450611105467. The next prime is 21450611105513. The reversal of 21450611105473 is 37450111605412.

It is a cyclic number.

It is not a de Polignac number, because 21450611105473 - 2²¹ = 21450609008321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21450611105453) by changing a digit.

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, 53649886 + ... + 54048232.

It is an arithmetic number, because the mean of its divisors is an integer number (777686833440).

Almost surely, 2^{21450611105473} is an apocalyptic number.

It is an amenable number.

21450611105473 is a deficient number, since it is larger than the sum of its proper divisors (3435367564607).

21450611105473 is a wasteful number, since it uses less digits than its factorization.

21450611105473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401029.

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 21450611105473 in words is "twenty-one trillion, four hundred fifty billion, six hundred eleven million, one hundred five thousand, four hundred seventy-three".