21341000520 has 192 divisors, whose sum is σ = 79398109440. Its totient is φ = 4869849600.

The previous prime is 21341000509. The next prime is 21341000533. The reversal of 21341000520 is 2500014312.

21341000520 is a `hidden beast` number, since 2 + 134 + 10 + 0 + 0 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21341000493 and 21341000502.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1583410 + ... + 1596830.

It is an arithmetic number, because the mean of its divisors is an integer number (413531820).

Almost surely, 2^21341000520 is an apocalyptic number.

21341000520 is a gapful number since it is divisible by the number (20) 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 21341000520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39699054720).

21341000520 is an abundant number, since it is smaller than the sum of its proper divisors (58057108920).

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

21341000520 is a wasteful number, since it uses less digits than its factorization.

21341000520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14076 (or 14069 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

Adding to 21341000520 its reverse (2500014312), we get a palindrome (23841014832).

The spelling of 21341000520 in words is "twenty-one billion, three hundred forty-one million, five hundred twenty", and thus it is an aban number.