20521445504241 has 8 divisors (see below), whose sum is σ = 29849375278944. Its totient is φ = 12437239699520.

The previous prime is 20521445504227. The next prime is 20521445504243. The reversal of 20521445504241 is 14240554412502.

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 20521445504241 - 2³⁴ = 20504265635057 is a prime.

It is a super-2 number, since 2×20521445504241² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20521445504241.

It is not an unprimeable number, because it can be changed into a prime (20521445504243) 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, 310930992456 + ... + 310930992521.

It is an arithmetic number, because the mean of its divisors is an integer number (3731171909868).

Almost surely, 2^{20521445504241} is an apocalyptic number.

It is an amenable number.

20521445504241 is a deficient number, since it is larger than the sum of its proper divisors (9327929774703).

20521445504241 is a wasteful number, since it uses less digits than its factorization.

20521445504241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621861984991.

The product of its (nonzero) digits is 256000, while the sum is 39.

Adding to 20521445504241 its reverse (14240554412502), we get a palindrome (34761999916743).

The spelling of 20521445504241 in words is "twenty trillion, five hundred twenty-one billion, four hundred forty-five million, five hundred four thousand, two hundred forty-one".