21641500014 has 32 divisors (see below), whose sum is σ = 44343573120. Its totient is φ = 7037480352.

The previous prime is 21641500003. The next prime is 21641500019. The reversal of 21641500014 is 41000514612.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21641500019) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 162652 + ... + 264080.

It is an arithmetic number, because the mean of its divisors is an integer number (1385736660).

Almost surely, 2^21641500014 is an apocalyptic number.

21641500014 is an abundant number, since it is smaller than the sum of its proper divisors (22702073106).

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

21641500014 is a wasteful number, since it uses less digits than its factorization.

21641500014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102304.

The product of its (nonzero) digits is 960, while the sum is 24.

The spelling of 21641500014 in words is "twenty-one billion, six hundred forty-one million, five hundred thousand, fourteen".