21376534907 has 8 divisors (see below), whose sum is σ = 26309581536. Its totient is φ = 16913302272.

The previous prime is 21376534889. The next prime is 21376534931. The reversal of 21376534907 is 70943567312.

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 21376534907 - 2⁶ = 21376534843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21376534807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117453398 + ... + 117453579.

It is an arithmetic number, because the mean of its divisors is an integer number (3288697692).

Almost surely, 2^21376534907 is an apocalyptic number.

21376534907 is a deficient number, since it is larger than the sum of its proper divisors (4933046629).

21376534907 is a wasteful number, since it uses less digits than its factorization.

21376534907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234906997.

The product of its (nonzero) digits is 952560, while the sum is 47.

The spelling of 21376534907 in words is "twenty-one billion, three hundred seventy-six million, five hundred thirty-four thousand, nine hundred seven".