21106560307 has 16 divisors (see below), whose sum is σ = 25827698880. Its totient is φ = 16835816448.

The previous prime is 21106560289. The next prime is 21106560313. The reversal of 21106560307 is 70306560112.

It is not a de Polignac number, because 21106560307 - 2¹¹ = 21106558259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21106560317) 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, 985848 + ... + 1007029.

It is an arithmetic number, because the mean of its divisors is an integer number (1614231180).

Almost surely, 2^21106560307 is an apocalyptic number.

21106560307 is a deficient number, since it is larger than the sum of its proper divisors (4721138573).

21106560307 is a wasteful number, since it uses less digits than its factorization.

21106560307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1992990.

The product of its (nonzero) digits is 7560, while the sum is 31.

The spelling of 21106560307 in words is "twenty-one billion, one hundred six million, five hundred sixty thousand, three hundred seven".