21250132850 has 24 divisors (see below), whose sum is σ = 39623851188. Its totient is φ = 8478848000.

The previous prime is 21250132811. The next prime is 21250132861. The reversal of 21250132850 is 5823105212.

It can be written as a sum of positive squares in 6 ways, for example, as 13274035369 + 7976097481 = 115213^2 + 89309^2 .

It is a super-2 number, since 2×21250132850² (a number of 21 digits) contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 509879 + ... + 549978.

Almost surely, 2^21250132850 is an apocalyptic number.

21250132850 is a deficient number, since it is larger than the sum of its proper divisors (18373718338).

21250132850 is a wasteful number, since it uses less digits than its factorization.

21250132850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060270 (or 1060265 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The spelling of 21250132850 in words is "twenty-one billion, two hundred fifty million, one hundred thirty-two thousand, eight hundred fifty".