21341299824 has 160 divisors (see below), whose sum is σ = 66080840000. Its totient is φ = 6555479040.

The previous prime is 21341299817. The next prime is 21341299831. The reversal of 21341299824 is 42899214312.

It is an interprime number because it is at equal distance from previous prime (21341299817) and next prime (21341299831).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 21341299824.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3709302 + ... + 3715050.

It is an arithmetic number, because the mean of its divisors is an integer number (413005250).

Almost surely, 2^21341299824 is an apocalyptic number.

21341299824 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21341299824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33040420000).

21341299824 is an abundant number, since it is smaller than the sum of its proper divisors (44739540176).

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

21341299824 is a wasteful number, since it uses less digits than its factorization.

21341299824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6440 (or 6428 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

It can be divided in two parts, 213412 and 99824, that added together give a triangular number (313236 = T₇₉₁).

The spelling of 21341299824 in words is "twenty-one billion, three hundred forty-one million, two hundred ninety-nine thousand, eight hundred twenty-four".