21124442024 has 32 divisors (see below), whose sum is σ = 45285454080. Its totient is φ = 9049573824.

The previous prime is 21124441979. The next prime is 21124442083. The reversal of 21124442024 is 42024442112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21124441984 and 21124442002.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 59954 + ... + 214110.

It is an arithmetic number, because the mean of its divisors is an integer number (1415170440).

Almost surely, 2^21124442024 is an apocalyptic number.

It is an amenable number.

21124442024 is an abundant number, since it is smaller than the sum of its proper divisors (24161012056).

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

21124442024 is a wasteful number, since it uses less digits than its factorization.

21124442024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156617 (or 156613 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 21124442024 its reverse (42024442112), we get a palindrome (63148884136).

The spelling of 21124442024 in words is "twenty-one billion, one hundred twenty-four million, four hundred forty-two thousand, twenty-four".