21459271679992 has 16 divisors (see below), whose sum is σ = 40276735963200. Its totient is φ = 10718808756480.

The previous prime is 21459271679971. The next prime is 21459271679999. The reversal of 21459271679992 is 29997617295412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21459271679999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1353377017 + ... + 1353392872.

It is an arithmetic number, because the mean of its divisors is an integer number (2517295997700).

Almost surely, 2^{21459271679992} is an apocalyptic number.

It is an amenable number.

21459271679992 is a deficient number, since it is larger than the sum of its proper divisors (18817464283208).

21459271679992 is a wasteful number, since it uses less digits than its factorization.

21459271679992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2706770886 (or 2706770882 counting only the distinct ones).

The product of its digits is 308629440, while the sum is 73.

The spelling of 21459271679992 in words is "twenty-one trillion, four hundred fifty-nine billion, two hundred seventy-one million, six hundred seventy-nine thousand, nine hundred ninety-two".