21676454859 has 16 divisors (see below), whose sum is σ = 29814202880. Its totient is φ = 14001910560.

The previous prime is 21676454777. The next prime is 21676454867. The reversal of 21676454859 is 95845467612.

It is not a de Polignac number, because 21676454859 - 2¹⁹ = 21675930571 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21676454799 and 21676454808.

It is not an unprimeable number, because it can be changed into a prime (21676454659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 871699 + ... + 896220.

It is an arithmetic number, because the mean of its divisors is an integer number (1863387680).

Almost surely, 2^21676454859 is an apocalyptic number.

21676454859 is a deficient number, since it is larger than the sum of its proper divisors (8137748021).

21676454859 is a wasteful number, since it uses less digits than its factorization.

21676454859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1768050.

The product of its digits is 14515200, while the sum is 57.

The spelling of 21676454859 in words is "twenty-one billion, six hundred seventy-six million, four hundred fifty-four thousand, eight hundred fifty-nine".