21066364115 has 16 divisors (see below), whose sum is σ = 25800353280. Its totient is φ = 16508759520.

The previous prime is 21066364093. The next prime is 21066364127. The reversal of 21066364115 is 51146366012.

It is not a de Polignac number, because 21066364115 - 2⁸ = 21066363859 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115691 + ... + 235620.

It is an arithmetic number, because the mean of its divisors is an integer number (1612522080).

Almost surely, 2^21066364115 is an apocalyptic number.

21066364115 is a deficient number, since it is larger than the sum of its proper divisors (4733989165).

21066364115 is a wasteful number, since it uses less digits than its factorization.

21066364115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351562.

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 21066364115 in words is "twenty-one billion, sixty-six million, three hundred sixty-four thousand, one hundred fifteen".