21602422412366 has 4 divisors (see below), whose sum is σ = 32403633618552. Its totient is φ = 10801211206182.

The previous prime is 21602422412353. The next prime is 21602422412371. The reversal of 21602422412366 is 66321422420612.

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, 5400605603090 + ... + 5400605603093.

It is an arithmetic number, because the mean of its divisors is an integer number (8100908404638).

Almost surely, 2^{21602422412366} is an apocalyptic number.

21602422412366 is a deficient number, since it is larger than the sum of its proper divisors (10801211206186).

21602422412366 is a wasteful number, since it uses less digits than its factorization.

21602422412366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10801211206185.

The product of its (nonzero) digits is 331776, while the sum is 41.

Adding to 21602422412366 its reverse (66321422420612), we get a palindrome (87923844832978).

The spelling of 21602422412366 in words is "twenty-one trillion, six hundred two billion, four hundred twenty-two million, four hundred twelve thousand, three hundred sixty-six".