21316513348268 has 24 divisors (see below), whose sum is σ = 39269348428800. Its totient is φ = 10096759140048.

The previous prime is 21316513348253. The next prime is 21316513348303. The reversal of 21316513348268 is 86284331561312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6012380 + ... + 8875907.

It is an arithmetic number, because the mean of its divisors is an integer number (1636222851200).

Almost surely, 2^{21316513348268} is an apocalyptic number.

It is an amenable number.

21316513348268 is a deficient number, since it is larger than the sum of its proper divisors (17952835080532).

21316513348268 is a wasteful number, since it uses less digits than its factorization.

21316513348268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14907149 (or 14907147 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 53.

The spelling of 21316513348268 in words is "twenty-one trillion, three hundred sixteen billion, five hundred thirteen million, three hundred forty-eight thousand, two hundred sixty-eight".