21756485714 has 4 divisors (see below), whose sum is σ = 32634728574. Its totient is φ = 10878242856.

The previous prime is 21756485693. The next prime is 21756485717. The reversal of 21756485714 is 41758465712.

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., 12570221689 + 9186264025 = 112117^2 + 95845^2 .

It is not an unprimeable number, because it can be changed into a prime (21756485717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5439121427 + ... + 5439121430.

Almost surely, 2^21756485714 is an apocalyptic number.

21756485714 is a deficient number, since it is larger than the sum of its proper divisors (10878242860).

21756485714 is a wasteful number, since it uses less digits than its factorization.

21756485714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10878242859.

The product of its digits is 1881600, while the sum is 50.

The spelling of 21756485714 in words is "twenty-one billion, seven hundred fifty-six million, four hundred eighty-five thousand, seven hundred fourteen".