21213613403416 has 48 divisors (see below), whose sum is σ = 46390296810240. Its totient is φ = 9067810812480.

The previous prime is 21213613403407. The next prime is 21213613403429. The reversal of 21213613403416 is 61430431631212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70497855 + ... + 70798126.

It is an arithmetic number, because the mean of its divisors is an integer number (966464516880).

Almost surely, 2^{21213613403416} is an apocalyptic number.

It is an amenable number.

21213613403416 is an abundant number, since it is smaller than the sum of its proper divisors (25176683406824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21213613403416 is a wasteful number, since it uses less digits than its factorization.

21213613403416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141296384 (or 141296373 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 37.

The spelling of 21213613403416 in words is "twenty-one trillion, two hundred thirteen billion, six hundred thirteen million, four hundred three thousand, four hundred sixteen".