21564002114 has 4 divisors (see below), whose sum is σ = 32346003174. Its totient is φ = 10782001056.

The previous prime is 21564002081. The next prime is 21564002129. The reversal of 21564002114 is 41120046512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12469518889 + 9094483225 = 111667^2 + 95365^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5391000527 + ... + 5391000530.

Almost surely, 2^21564002114 is an apocalyptic number.

21564002114 is a deficient number, since it is larger than the sum of its proper divisors (10782001060).

21564002114 is a wasteful number, since it uses less digits than its factorization.

21564002114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10782001059.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 21564002114 its reverse (41120046512), we get a palindrome (62684048626).

The spelling of 21564002114 in words is "twenty-one billion, five hundred sixty-four million, two thousand, one hundred fourteen".