20521522115504 has 40 divisors (see below), whose sum is σ = 39804119397120. Its totient is φ = 10249497338688.

The previous prime is 20521522115401. The next prime is 20521522115543. The reversal of 20521522115504 is 40551122512502.

It is a super-2 number, since 2×20521522115504² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54764909 + ... + 55138355.

It is an arithmetic number, because the mean of its divisors is an integer number (995102984928).

Almost surely, 2^{20521522115504} is an apocalyptic number.

It is an amenable number.

20521522115504 is a deficient number, since it is larger than the sum of its proper divisors (19282597281616).

20521522115504 is a wasteful number, since it uses less digits than its factorization.

20521522115504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377217 (or 377211 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 35.

The spelling of 20521522115504 in words is "twenty trillion, five hundred twenty-one billion, five hundred twenty-two million, one hundred fifteen thousand, five hundred four".