21616425423106 has 8 divisors (see below), whose sum is σ = 33300979705980. Its totient is φ = 10516098854448.

The previous prime is 21616425423079. The next prime is 21616425423121. The reversal of 21616425423106 is 60132452461612.

It can be written as a sum of positive squares in 2 ways, for example, as 15551263233081 + 6065162190025 = 3943509^2 + 2462755^2 .

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

It is a super-2 number, since 2×21616425423106² (a number of 27 digits) contains 22 as substring.

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 in 3 ways as a sum of consecutive naturals, for example, 146056928461 + ... + 146056928608.

Almost surely, 2^{21616425423106} is an apocalyptic number.

21616425423106 is a deficient number, since it is larger than the sum of its proper divisors (11684554282874).

21616425423106 is a wasteful number, since it uses less digits than its factorization.

21616425423106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292113857108.

The product of its (nonzero) digits is 414720, while the sum is 43.

Adding to 21616425423106 its reverse (60132452461612), we get a palindrome (81748877884718).

The spelling of 21616425423106 in words is "twenty-one trillion, six hundred sixteen billion, four hundred twenty-five million, four hundred twenty-three thousand, one hundred six".