21204341010 has 96 divisors (see below), whose sum is σ = 57564494208. Its totient is φ = 5405241600.

The previous prime is 21204341003. The next prime is 21204341021. The reversal of 21204341010 is 1014340212.

21204341010 is a `hidden beast` number, since 212 + 0 + 43 + 410 + 1 + 0 = 666.

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

It is a Curzon number.

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, 5899774 + ... + 5903366.

It is an arithmetic number, because the mean of its divisors is an integer number (599630148).

Almost surely, 2^21204341010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21204341010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28782247104).

21204341010 is an abundant number, since it is smaller than the sum of its proper divisors (36360153198).

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

21204341010 is a wasteful number, since it uses less digits than its factorization.

21204341010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6480 (or 6477 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21204341010 its reverse (1014340212), we get a palindrome (22218681222).

The spelling of 21204341010 in words is "twenty-one billion, two hundred four million, three hundred forty-one thousand, ten".