21613854116 has 12 divisors (see below), whose sum is σ = 38056296432. Its totient is φ = 10740626568.

The previous prime is 21613854091. The next prime is 21613854127. The reversal of 21613854116 is 61145831612.

It is a self number, because there is not a number n which added to its sum of digits gives 21613854116.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16574390 + ... + 16575693.

It is an arithmetic number, because the mean of its divisors is an integer number (3171358036).

Almost surely, 2^21613854116 is an apocalyptic number.

It is an amenable number.

21613854116 is a deficient number, since it is larger than the sum of its proper divisors (16442442316).

21613854116 is a wasteful number, since it uses less digits than its factorization.

21613854116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33150250 (or 33150248 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The spelling of 21613854116 in words is "twenty-one billion, six hundred thirteen million, eight hundred fifty-four thousand, one hundred sixteen".