21541412115045 has 20 divisors (see below), whose sum is σ = 38614975792140. Its totient is φ = 11488753127808.

The previous prime is 21541412114993. The next prime is 21541412115053. The reversal of 21541412115045 is 54051121414512.

21541412115045 is a `hidden beast` number, since 2 + 1 + 5 + 4 + 141 + 2 + 1 + 1 + 504 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16559829168129 + 4981582946916 = 4069377^2 + 2231946^2 .

It is not a de Polignac number, because 21541412115045 - 2⁷ = 21541412114917 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 26594335540 + ... + 26594336349.

It is an arithmetic number, because the mean of its divisors is an integer number (1930748789607).

Almost surely, 2^{21541412115045} is an apocalyptic number.

It is an amenable number.

21541412115045 is a deficient number, since it is larger than the sum of its proper divisors (17073563677095).

21541412115045 is an equidigital number, since it uses as much as digits as its factorization.

21541412115045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53188671906 (or 53188671897 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 36.

Adding to 21541412115045 its reverse (54051121414512), we get a palindrome (75592533529557).

The spelling of 21541412115045 in words is "twenty-one trillion, five hundred forty-one billion, four hundred twelve million, one hundred fifteen thousand, forty-five".