21144334024 has 32 divisors (see below), whose sum is σ = 44304654240. Its totient is φ = 9376643200.

The previous prime is 21144333949. The next prime is 21144334031. The reversal of 21144334024 is 42043344112.

It is a super-2 number, since 2×21144334024² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21144333983 and 21144334001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2926594 + ... + 2933809.

It is an arithmetic number, because the mean of its divisors is an integer number (1384520445).

Almost surely, 2^21144334024 is an apocalyptic number.

It is an amenable number.

21144334024 is an abundant number, since it is smaller than the sum of its proper divisors (23160320216).

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

21144334024 is a wasteful number, since it uses less digits than its factorization.

21144334024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5860461 (or 5860457 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 21144334024 its reverse (42043344112), we get a palindrome (63187678136).

The spelling of 21144334024 in words is "twenty-one billion, one hundred forty-four million, three hundred thirty-four thousand, twenty-four".