20541502441521 has 16 divisors (see below), whose sum is σ = 30432059349120. Its totient is φ = 13694243214960.

The previous prime is 20541502441501. The next prime is 20541502441573. The reversal of 20541502441521 is 12514420514502.

20541502441521 is a `hidden beast` number, since 2 + 0 + 5 + 41 + 50 + 2 + 4 + 41 + 521 = 666.

It is not a de Polignac number, because 20541502441521 - 2⁵ = 20541502441489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20541502441501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1684051 + ... + 6627143.

It is an arithmetic number, because the mean of its divisors is an integer number (1902003709320).

Almost surely, 2^{20541502441521} is an apocalyptic number.

It is an amenable number.

20541502441521 is a deficient number, since it is larger than the sum of its proper divisors (9890556907599).

20541502441521 is a wasteful number, since it uses less digits than its factorization.

20541502441521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5097013 (or 5097007 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 36.

The spelling of 20541502441521 in words is "twenty trillion, five hundred forty-one billion, five hundred two million, four hundred forty-one thousand, five hundred twenty-one".