21051735286 has 16 divisors (see below), whose sum is σ = 31812066000. Its totient is φ = 10447813728.

The previous prime is 21051735283. The next prime is 21051735301. The reversal of 21051735286 is 68253715012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21051735283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 408685 + ... + 457303.

It is an arithmetic number, because the mean of its divisors is an integer number (1988254125).

Almost surely, 2^21051735286 is an apocalyptic number.

21051735286 is a deficient number, since it is larger than the sum of its proper divisors (10760330714).

21051735286 is a wasteful number, since it uses less digits than its factorization.

21051735286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50223.

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 21051735286 in words is "twenty-one billion, fifty-one million, seven hundred thirty-five thousand, two hundred eighty-six".