21444024402012 has 48 divisors (see below), whose sum is σ = 52221816928512. Its totient is φ = 6835879079040.

The previous prime is 21444024401981. The next prime is 21444024402029. The reversal of 21444024402012 is 21020442044412.

It is a super-2 number, since 2×21444024402012² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 6243358 + ... + 9048069.

It is an arithmetic number, because the mean of its divisors is an integer number (1087954519344).

Almost surely, 2^{21444024402012} is an apocalyptic number.

It is an amenable number.

21444024402012 is an abundant number, since it is smaller than the sum of its proper divisors (30777792526500).

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

21444024402012 is a wasteful number, since it uses less digits than its factorization.

21444024402012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15296538 (or 15296536 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 30.

Adding to 21444024402012 its reverse (21020442044412), we get a palindrome (42464466446424).

The spelling of 21444024402012 in words is "twenty-one trillion, four hundred forty-four billion, twenty-four million, four hundred two thousand, twelve".