21450686150 has 12 divisors (see below), whose sum is σ = 39898276332. Its totient is φ = 8580274440.

The previous prime is 21450686149. The next prime is 21450686161. The reversal of 21450686150 is 5168605412.

It is a happy number.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 214506812 + ... + 214506911.

It is an arithmetic number, because the mean of its divisors is an integer number (3324856361).

Almost surely, 2^21450686150 is an apocalyptic number.

21450686150 is a deficient number, since it is larger than the sum of its proper divisors (18447590182).

21450686150 is a wasteful number, since it uses less digits than its factorization.

21450686150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429013735 (or 429013730 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 38.

The spelling of 21450686150 in words is "twenty-one billion, four hundred fifty million, six hundred eighty-six thousand, one hundred fifty".