21616051036436 has 48 divisors (see below), whose sum is σ = 41803979938560. Its totient is φ = 9727830858240.

The previous prime is 21616051036429. The next prime is 21616051036439. The reversal of 21616051036436 is 63463015061612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21616051036439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5538506 + ... + 8596926.

It is an arithmetic number, because the mean of its divisors is an integer number (870916248720).

Almost surely, 2^{21616051036436} is an apocalyptic number.

It is an amenable number.

21616051036436 is a deficient number, since it is larger than the sum of its proper divisors (20187928902124).

21616051036436 is a wasteful number, since it uses less digits than its factorization.

21616051036436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3062984 (or 3062982 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 44.

The spelling of 21616051036436 in words is "twenty-one trillion, six hundred sixteen billion, fifty-one million, thirty-six thousand, four hundred thirty-six".