21124200344 has 32 divisors (see below), whose sum is σ = 42695441040. Its totient is φ = 9740304000.

The previous prime is 21124200341. The next prime is 21124200347. The reversal of 21124200344 is 44300242112.

It is an interprime number because it is at equal distance from previous prime (21124200341) and next prime (21124200347).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21124200341) 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 7 ways as a sum of consecutive naturals, for example, 12674 + ... + 205934.

Almost surely, 2^21124200344 is an apocalyptic number.

It is an amenable number.

21124200344 is an abundant number, since it is smaller than the sum of its proper divisors (21571240696).

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

21124200344 is a wasteful number, since it uses less digits than its factorization.

21124200344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194331 (or 194327 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21124200344 its reverse (44300242112), we get a palindrome (65424442456).

The spelling of 21124200344 in words is "twenty-one billion, one hundred twenty-four million, two hundred thousand, three hundred forty-four".