21124134024 has 48 divisors (see below), whose sum is σ = 61432434000. Its totient is φ = 6035466528.

The previous prime is 21124134011. The next prime is 21124134043. The reversal of 21124134024 is 42043142112.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 21124133985 and 21124134003.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8980174 + ... + 8982525.

It is an arithmetic number, because the mean of its divisors is an integer number (1279842375).

Almost surely, 2^21124134024 is an apocalyptic number.

21124134024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21124134024 is an abundant number, since it is smaller than the sum of its proper divisors (40308299976).

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

21124134024 is a wasteful number, since it uses less digits than its factorization.

21124134024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17962722 (or 17962711 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21124134024 its reverse (42043142112), we get a palindrome (63167276136).

The spelling of 21124134024 in words is "twenty-one billion, one hundred twenty-four million, one hundred thirty-four thousand, twenty-four".