21161236714 has 4 divisors (see below), whose sum is σ = 31741855074. Its totient is φ = 10580618356.

The previous prime is 21161236703. The next prime is 21161236753. The reversal of 21161236714 is 41763216112.

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., 21015431089 + 145805625 = 144967^2 + 12075^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21161236714.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5290309177 + ... + 5290309180.

Almost surely, 2^21161236714 is an apocalyptic number.

21161236714 is a deficient number, since it is larger than the sum of its proper divisors (10580618360).

21161236714 is a wasteful number, since it uses less digits than its factorization.

21161236714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10580618359.

The product of its digits is 12096, while the sum is 34.

The spelling of 21161236714 in words is "twenty-one billion, one hundred sixty-one million, two hundred thirty-six thousand, seven hundred fourteen".