21513636041 has 8 divisors (see below), whose sum is σ = 21881104800. Its totient is φ = 21146261760.

The previous prime is 21513636037. The next prime is 21513636077. The reversal of 21513636041 is 14063631512.

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

It is a cyclic number.

It is not a de Polignac number, because 21513636041 - 2² = 21513636037 is a prime.

It is a super-2 number, since 2×21513636041² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21513635989 and 21513636007.

It is not an unprimeable number, because it can be changed into a prime (21513636241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 555881 + ... + 593321.

It is an arithmetic number, because the mean of its divisors is an integer number (2735138100).

Almost surely, 2^21513636041 is an apocalyptic number.

It is an amenable number.

21513636041 is a deficient number, since it is larger than the sum of its proper divisors (367468759).

21513636041 is an equidigital number, since it uses as much as digits as its factorization.

21513636041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47239.

The product of its (nonzero) digits is 12960, while the sum is 32.

The spelling of 21513636041 in words is "twenty-one billion, five hundred thirteen million, six hundred thirty-six thousand, forty-one".