21442955124 has 48 divisors (see below), whose sum is σ = 50485413888. Its totient is φ = 7083343488.

The previous prime is 21442955123. The next prime is 21442955129. The reversal of 21442955124 is 42155924412.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21442955123) 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, 706714 + ... + 736430.

It is an arithmetic number, because the mean of its divisors is an integer number (1051779456).

Almost surely, 2^21442955124 is an apocalyptic number.

It is an amenable number.

21442955124 is an abundant number, since it is smaller than the sum of its proper divisors (29042458764).

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

21442955124 is a wasteful number, since it uses less digits than its factorization.

21442955124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30264 (or 30262 counting only the distinct ones).

The product of its digits is 115200, while the sum is 39.

The spelling of 21442955124 in words is "twenty-one billion, four hundred forty-two million, nine hundred fifty-five thousand, one hundred twenty-four".