21165460323214 has 4 divisors (see below), whose sum is σ = 31748190484824. Its totient is φ = 10582730161606.

The previous prime is 21165460323191. The next prime is 21165460323223. The reversal of 21165460323214 is 41232306456112.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5291365080802 + ... + 5291365080805.

It is an arithmetic number, because the mean of its divisors is an integer number (7937047621206).

Almost surely, 2^{21165460323214} is an apocalyptic number.

21165460323214 is a deficient number, since it is larger than the sum of its proper divisors (10582730161610).

21165460323214 is a wasteful number, since it uses less digits than its factorization.

21165460323214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10582730161609.

The product of its (nonzero) digits is 207360, while the sum is 40.

Adding to 21165460323214 its reverse (41232306456112), we get a palindrome (62397766779326).

The spelling of 21165460323214 in words is "twenty-one trillion, one hundred sixty-five billion, four hundred sixty million, three hundred twenty-three thousand, two hundred fourteen".