21124034413 has 8 divisors (see below), whose sum is σ = 21697744640. Its totient is φ = 20550471120.

The previous prime is 21124034363. The next prime is 21124034423. The reversal of 21124034413 is 31443042112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21124034413 - 2¹⁷ = 21123903341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21124034423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 294748 + ... + 359338.

It is an arithmetic number, because the mean of its divisors is an integer number (2712218080).

Almost surely, 2^21124034413 is an apocalyptic number.

It is an amenable number.

21124034413 is a deficient number, since it is larger than the sum of its proper divisors (573710227).

21124034413 is an equidigital number, since it uses as much as digits as its factorization.

21124034413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73467.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21124034413 its reverse (31443042112), we get a palindrome (52567076525).

The spelling of 21124034413 in words is "twenty-one billion, one hundred twenty-four million, thirty-four thousand, four hundred thirteen".