21714755177 has 4 divisors (see below), whose sum is σ = 21715358340. Its totient is φ = 21714152016.

The previous prime is 21714755171. The next prime is 21714755203. The reversal of 21714755177 is 77155741712.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17707358761 + 4007396416 = 133069^2 + 63304^2 .

It is a cyclic number.

It is not a de Polignac number, because 21714755177 - 2¹⁸ = 21714493033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21714755171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243902 + ... + 320807.

It is an arithmetic number, because the mean of its divisors is an integer number (5428839585).

Almost surely, 2^21714755177 is an apocalyptic number.

It is an amenable number.

21714755177 is a deficient number, since it is larger than the sum of its proper divisors (603163).

21714755177 is an equidigital number, since it uses as much as digits as its factorization.

21714755177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603162.

The product of its digits is 480200, while the sum is 47.

The spelling of 21714755177 in words is "twenty-one billion, seven hundred fourteen million, seven hundred fifty-five thousand, one hundred seventy-seven".