21606463335334 has 4 divisors (see below), whose sum is σ = 32409695003004. Its totient is φ = 10803231667666.

The previous prime is 21606463335323. The next prime is 21606463335341. The reversal of 21606463335334 is 43353336460612.

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

It is a super-2 number, since 2×21606463335334² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5401615833832 + ... + 5401615833835.

It is an arithmetic number, because the mean of its divisors is an integer number (8102423750751).

Almost surely, 2^{21606463335334} is an apocalyptic number.

21606463335334 is a deficient number, since it is larger than the sum of its proper divisors (10803231667670).

21606463335334 is a wasteful number, since it uses less digits than its factorization.

21606463335334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10803231667669.

The product of its (nonzero) digits is 8398080, while the sum is 49.

Adding to 21606463335334 its reverse (43353336460612), we get a palindrome (64959799795946).

The spelling of 21606463335334 in words is "twenty-one trillion, six hundred six billion, four hundred sixty-three million, three hundred thirty-five thousand, three hundred thirty-four".