21050071350 has 96 divisors (see below), whose sum is σ = 65085762816. Its totient is φ = 4374038400.

The previous prime is 21050071337. The next prime is 21050071379. The reversal of 21050071350 is 5317005012.

It is a self number, because there is not a number n which added to its sum of digits gives 21050071350.

It is a congruent 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 47 ways as a sum of consecutive naturals, for example, 899709 + ... + 922808.

It is an arithmetic number, because the mean of its divisors is an integer number (677976696).

Almost surely, 2^21050071350 is an apocalyptic number.

21050071350 is an abundant number, since it is smaller than the sum of its proper divisors (44035691466).

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

21050071350 is a wasteful number, since it uses less digits than its factorization.

21050071350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1822550 (or 1822545 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 24.

Adding to 21050071350 its reverse (5317005012), we get a palindrome (26367076362).

The spelling of 21050071350 in words is "twenty-one billion, fifty million, seventy-one thousand, three hundred fifty".