21376001202516 has 36 divisors (see below), whose sum is σ = 54034268543892. Its totient is φ = 7125269418624.

The previous prime is 21376001202407. The next prime is 21376001202533. The reversal of 21376001202516 is 61520210067312.

21376001202516 is a `hidden beast` number, since 2 + 1 + 3 + 7 + 600 + 1 + 20 + 25 + 1 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5135907192516 + 16240094010000 = 2266254^2 + 4029900^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 1451146 + ... + 6697598.

It is an arithmetic number, because the mean of its divisors is an integer number (1500951903997).

Almost surely, 2^{21376001202516} is an apocalyptic number.

It is an amenable number.

21376001202516 is an abundant number, since it is smaller than the sum of its proper divisors (32658267341376).

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

21376001202516 is a wasteful number, since it uses less digits than its factorization.

21376001202516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5359640 (or 5359635 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

Adding to 21376001202516 its reverse (61520210067312), we get a palindrome (82896211269828).

The spelling of 21376001202516 in words is "twenty-one trillion, three hundred seventy-six billion, one million, two hundred two thousand, five hundred sixteen".