21861446750 has 128 divisors (see below), whose sum is σ = 48802231296. Its totient is φ = 7227792000.

The previous prime is 21861446723. The next prime is 21861446839. The reversal of 21861446750 is 5764416812.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 2390687 + ... + 2399813.

It is an arithmetic number, because the mean of its divisors is an integer number (381267432).

Almost surely, 2^21861446750 is an apocalyptic number.

21861446750 is an abundant number, since it is smaller than the sum of its proper divisors (26940784546).

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

21861446750 is a wasteful number, since it uses less digits than its factorization.

21861446750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9235 (or 9225 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 44.

The spelling of 21861446750 in words is "twenty-one billion, eight hundred sixty-one million, four hundred forty-six thousand, seven hundred fifty".