21665346161414 has 16 divisors (see below), whose sum is σ = 34424805992688. Its totient is φ = 10190971517952.

The previous prime is 21665346161413. The next prime is 21665346161453. The reversal of 21665346161414 is 41416164356612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21665346161413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140093432 + ... + 140247995.

It is an arithmetic number, because the mean of its divisors is an integer number (2151550374543).

Almost surely, 2^{21665346161414} is an apocalyptic number.

21665346161414 is a deficient number, since it is larger than the sum of its proper divisors (12759459831274).

21665346161414 is a wasteful number, since it uses less digits than its factorization.

21665346161414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280343719.

The product of its digits is 2488320, while the sum is 50.

The spelling of 21665346161414 in words is "twenty-one trillion, six hundred sixty-five billion, three hundred forty-six million, one hundred sixty-one thousand, four hundred fourteen".