21602354274361 has 8 divisors (see below), whose sum is σ = 24688799134784. Its totient is φ = 18516007976400.

The previous prime is 21602354274301. The next prime is 21602354274427. The reversal of 21602354274361 is 16347245320612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21602354274361 - 2¹³ = 21602354266169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21602354274301) 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, 24170355 + ... + 25048168.

It is an arithmetic number, because the mean of its divisors is an integer number (3086099891848).

Almost surely, 2^{21602354274361} is an apocalyptic number.

It is an amenable number.

21602354274361 is a deficient number, since it is larger than the sum of its proper divisors (3086444860423).

21602354274361 is an equidigital number, since it uses as much as digits as its factorization.

21602354274361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49281231.

The product of its (nonzero) digits is 1451520, while the sum is 46.

Adding to 21602354274361 its reverse (16347245320612), we get a palindrome (37949599594973).

The spelling of 21602354274361 in words is "twenty-one trillion, six hundred two billion, three hundred fifty-four million, two hundred seventy-four thousand, three hundred sixty-one".