21145053000204 has 72 divisors (see below), whose sum is σ = 61086232247040. Its totient is φ = 6041391931872.

The previous prime is 21145053000193. The next prime is 21145053000217. The reversal of 21145053000204 is 40200035054112.

21145053000204 is a `hidden beast` number, since 2 + 1 + 1 + 450 + 5 + 3 + 0 + 0 + 0 + 204 = 666.

It is a super-2 number, since 2×21145053000204² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36636447 + ... + 37209129.

It is an arithmetic number, because the mean of its divisors is an integer number (848419892320).

Almost surely, 2^{21145053000204} is an apocalyptic number.

It is an amenable number.

21145053000204 is an abundant number, since it is smaller than the sum of its proper divisors (39941179246836).

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

21145053000204 is a wasteful number, since it uses less digits than its factorization.

21145053000204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719219 (or 719214 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 21145053000204 its reverse (40200035054112), we get a palindrome (61345088054316).

The spelling of 21145053000204 in words is "twenty-one trillion, one hundred forty-five billion, fifty-three million, two hundred four", and thus it is an aban number.