21013276689650 has 192 divisors, whose sum is σ = 47720789673984. Its totient is φ = 6731956224000.

The previous prime is 21013276689637. The next prime is 21013276689661. The reversal of 21013276689650 is 5698667231012.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 42906962 + ... + 43393938.

It is an arithmetic number, because the mean of its divisors is an integer number (248545779552).

Almost surely, 2^{21013276689650} is an apocalyptic number.

21013276689650 is an abundant number, since it is smaller than the sum of its proper divisors (26707512984334).

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

21013276689650 is a wasteful number, since it uses less digits than its factorization.

21013276689650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487165 (or 487160 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 21013276689650 in words is "twenty-one trillion, thirteen billion, two hundred seventy-six million, six hundred eighty-nine thousand, six hundred fifty".