21124202344 has 16 divisors (see below), whose sum is σ = 45266148000. Its totient is φ = 9053229552.

The previous prime is 21124202303. The next prime is 21124202347. The reversal of 21124202344 is 44320242112.

It is not an unprimeable number, because it can be changed into a prime (21124202347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188608894 + ... + 188609005.

It is an arithmetic number, because the mean of its divisors is an integer number (2829134250).

Almost surely, 2^21124202344 is an apocalyptic number.

It is an amenable number.

21124202344 is an abundant number, since it is smaller than the sum of its proper divisors (24141945656).

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

21124202344 is a wasteful number, since it uses less digits than its factorization.

21124202344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377217912 (or 377217908 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21124202344 its reverse (44320242112), we get a palindrome (65444444456).

The spelling of 21124202344 in words is "twenty-one billion, one hundred twenty-four million, two hundred two thousand, three hundred forty-four".