21423538762616 has 8 divisors (see below), whose sum is σ = 40169135179920. Its totient is φ = 10711769381304.

The previous prime is 21423538762607. The next prime is 21423538762651. The reversal of 21423538762616 is 61626783532412.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×21423538762616² (a number of 27 digits) contains 22 as substring.

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, 1338971172656 + ... + 1338971172671.

It is an arithmetic number, because the mean of its divisors is an integer number (5021141897490).

Almost surely, 2^{21423538762616} is an apocalyptic number.

It is an amenable number.

21423538762616 is a deficient number, since it is larger than the sum of its proper divisors (18745596417304).

21423538762616 is a wasteful number, since it uses less digits than its factorization.

21423538762616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2677942345333 (or 2677942345329 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 56.

The spelling of 21423538762616 in words is "twenty-one trillion, four hundred twenty-three billion, five hundred thirty-eight million, seven hundred sixty-two thousand, six hundred sixteen".