21541053112540 has 48 divisors (see below), whose sum is σ = 48716797120992. Its totient is φ = 7953476426496.

The previous prime is 21541053112517. The next prime is 21541053112549. The reversal of 21541053112540 is 4521135014512.

It is a super-3 number, since 3×21541053112540³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21541053112496 and 21541053112505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21541053112549) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 14307762 + ... + 15741478.

It is an arithmetic number, because the mean of its divisors is an integer number (1014933273354).

Almost surely, 2^{21541053112540} is an apocalyptic number.

21541053112540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21541053112540 is an abundant number, since it is smaller than the sum of its proper divisors (27175744008452).

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

21541053112540 is a wasteful number, since it uses less digits than its factorization.

21541053112540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491526 (or 1491524 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 34.

The spelling of 21541053112540 in words is "twenty-one trillion, five hundred forty-one billion, fifty-three million, one hundred twelve thousand, five hundred forty".