21515412005330 has 8 divisors (see below), whose sum is σ = 38727741609612. Its totient is φ = 8606164802128.

The previous prime is 21515412005303. The next prime is 21515412005363. The reversal of 21515412005330 is 3350021451512.

It can be written as a sum of positive squares in 2 ways, for example, as 21494062996561 + 21349008769 = 4636169^2 + 146113^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1075770600257 + ... + 1075770600276.

Almost surely, 2^{21515412005330} is an apocalyptic number.

21515412005330 is a deficient number, since it is larger than the sum of its proper divisors (17212329604282).

21515412005330 is a wasteful number, since it uses less digits than its factorization.

21515412005330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2151541200540.

The product of its (nonzero) digits is 18000, while the sum is 32.

Adding to 21515412005330 its reverse (3350021451512), we get a palindrome (24865433456842).

The spelling of 21515412005330 in words is "twenty-one trillion, five hundred fifteen billion, four hundred twelve million, five thousand, three hundred thirty".