21849440264 has 64 divisors (see below), whose sum is σ = 44542742400. Its totient is φ = 10009304064.

The previous prime is 21849440237. The next prime is 21849440293. The reversal of 21849440264 is 46204494812.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 813254 + ... + 839690.

It is an arithmetic number, because the mean of its divisors is an integer number (695980350).

Almost surely, 2^21849440264 is an apocalyptic number.

It is an amenable number.

21849440264 is an abundant number, since it is smaller than the sum of its proper divisors (22693302136).

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

21849440264 is a wasteful number, since it uses less digits than its factorization.

21849440264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26622 (or 26618 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 44.

The spelling of 21849440264 in words is "twenty-one billion, eight hundred forty-nine million, four hundred forty thousand, two hundred sixty-four".