21214764514 has 4 divisors (see below), whose sum is σ = 31822146774. Its totient is φ = 10607382256.

The previous prime is 21214764511. The next prime is 21214764523. The reversal of 21214764514 is 41546741212.

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., 16379648289 + 4835116225 = 127983^2 + 69535^2 .

It is not an unprimeable number, because it can be changed into a prime (21214764511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5303691127 + ... + 5303691130.

Almost surely, 2^21214764514 is an apocalyptic number.

21214764514 is a deficient number, since it is larger than the sum of its proper divisors (10607382260).

21214764514 is a wasteful number, since it uses less digits than its factorization.

21214764514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10607382259.

The product of its digits is 53760, while the sum is 37.

The spelling of 21214764514 in words is "twenty-one billion, two hundred fourteen million, seven hundred sixty-four thousand, five hundred fourteen".