21275434979459 has 8 divisors (see below), whose sum is σ = 22447155732480. Its totient is φ = 20108910328200.

The previous prime is 21275434979453. The next prime is 21275434979489. The reversal of 21275434979459 is 95497943457212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21275434979459 - 2³² = 21271140012163 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21275434979392 and 21275434979401.

It is not an unprimeable number, because it can be changed into a prime (21275434979453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1299017027 + ... + 1299033404.

It is an arithmetic number, because the mean of its divisors is an integer number (2805894466560).

Almost surely, 2^{21275434979459} is an apocalyptic number.

21275434979459 is a deficient number, since it is larger than the sum of its proper divisors (1171720753021).

21275434979459 is a wasteful number, since it uses less digits than its factorization.

21275434979459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2598050881.

The product of its digits is 685843200, while the sum is 71.

The spelling of 21275434979459 in words is "twenty-one trillion, two hundred seventy-five billion, four hundred thirty-four million, nine hundred seventy-nine thousand, four hundred fifty-nine".