21534650366 has 16 divisors (see below), whose sum is σ = 32925761280. Its totient is φ = 10560244440.

The previous prime is 21534650353. The next prime is 21534650383. The reversal of 21534650366 is 66305643512.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 160856 + ... + 262571.

It is an arithmetic number, because the mean of its divisors is an integer number (2057860080).

Almost surely, 2^21534650366 is an apocalyptic number.

21534650366 is a deficient number, since it is larger than the sum of its proper divisors (11391110914).

21534650366 is a wasteful number, since it uses less digits than its factorization.

21534650366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423919.

The product of its (nonzero) digits is 388800, while the sum is 41.

The spelling of 21534650366 in words is "twenty-one billion, five hundred thirty-four million, six hundred fifty thousand, three hundred sixty-six".