21444661014 has 64 divisors (see below), whose sum is σ = 49232904192. Its totient is φ = 6100048800.

The previous prime is 21444661003. The next prime is 21444661019. The reversal of 21444661014 is 41016644412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21444661019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11711079 + ... + 11712909.

It is an arithmetic number, because the mean of its divisors is an integer number (769264128).

Almost surely, 2^21444661014 is an apocalyptic number.

21444661014 is an abundant number, since it is smaller than the sum of its proper divisors (27788243178).

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

21444661014 is a wasteful number, since it uses less digits than its factorization.

21444661014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2921.

The product of its (nonzero) digits is 18432, while the sum is 33.

The spelling of 21444661014 in words is "twenty-one billion, four hundred forty-four million, six hundred sixty-one thousand, fourteen".