21887061250 has 40 divisors (see below), whose sum is σ = 42439836780. Its totient is φ = 8452920000.

The previous prime is 21887061233. The next prime is 21887061341. The reversal of 21887061250 is 5216078812.

It can be written as a sum of positive squares in 10 ways, for example, as 980503969 + 20906557281 = 31313^2 + 144591^2 .

It is a super-2 number, since 2×21887061250² (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 (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 265641 + ... + 338140.

Almost surely, 2^21887061250 is an apocalyptic number.

21887061250 is a deficient number, since it is larger than the sum of its proper divisors (20552775530).

21887061250 is an equidigital number, since it uses as much as digits as its factorization.

21887061250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603832 (or 603817 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 40.

The spelling of 21887061250 in words is "twenty-one billion, eight hundred eighty-seven million, sixty-one thousand, two hundred fifty".