21276265059 has 60 divisors (see below), whose sum is σ = 37057581000. Its totient is φ = 12129772032.

The previous prime is 21276265057. The next prime is 21276265063. The reversal of 21276265059 is 95056267212.

21276265059 is a `hidden beast` number, since 2 + 12 + 7 + 626 + 5 + 0 + 5 + 9 = 666.

It is not a de Polignac number, because 21276265059 - 2¹ = 21276265057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21276265057) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1776112 + ... + 1788050.

It is an arithmetic number, because the mean of its divisors is an integer number (617626350).

Almost surely, 2^21276265059 is an apocalyptic number.

21276265059 is a deficient number, since it is larger than the sum of its proper divisors (15781315941).

21276265059 is a wasteful number, since it uses less digits than its factorization.

21276265059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12414 (or 12398 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The spelling of 21276265059 in words is "twenty-one billion, two hundred seventy-six million, two hundred sixty-five thousand, fifty-nine".