21244465000 has 80 divisors (see below), whose sum is σ = 54300993120. Its totient is φ = 7725240000.

The previous prime is 21244464949. The next prime is 21244465001. The reversal of 21244465000 is 56444212.

It is a self number, because there is not a number n which added to its sum of digits gives 21244465000.

It is not an unprimeable number, because it can be changed into a prime (21244465001) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 138132 + ... + 248131.

It is an arithmetic number, because the mean of its divisors is an integer number (678762414).

Almost surely, 2^21244465000 is an apocalyptic number.

21244465000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21244465000 is an abundant number, since it is smaller than the sum of its proper divisors (33056528120).

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

21244465000 is a wasteful number, since it uses less digits than its factorization.

21244465000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386300 (or 386281 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The spelling of 21244465000 in words is "twenty-one billion, two hundred forty-four million, four hundred sixty-five thousand".