21250302512 has 40 divisors (see below), whose sum is σ = 42841918656. Its totient is φ = 10202855936.

The previous prime is 21250302511. The next prime is 21250302523. The reversal of 21250302512 is 21520305212.

It is not an unprimeable number, because it can be changed into a prime (21250302511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226733 + ... + 306444.

Almost surely, 2^21250302512 is an apocalyptic number.

It is an amenable number.

21250302512 is an abundant number, since it is smaller than the sum of its proper divisors (21591616144).

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

21250302512 is a wasteful number, since it uses less digits than its factorization.

21250302512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533285 (or 533279 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 21250302512 its reverse (21520305212), we get a palindrome (42770607724).

The spelling of 21250302512 in words is "twenty-one billion, two hundred fifty million, three hundred two thousand, five hundred twelve".