20521530005199 has 32 divisors (see below), whose sum is σ = 28093629288960. Its totient is φ = 13319872140288.

The previous prime is 20521530005189. The next prime is 20521530005227. The reversal of 20521530005199 is 99150003512502.

It is not a de Polignac number, because 20521530005199 - 2¹¹ = 20521530003151 is a prime.

It is a super-2 number, since 2×20521530005199² (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 20521530005199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20521530005129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25667587 + ... + 26455019.

It is an arithmetic number, because the mean of its divisors is an integer number (877925915280).

Almost surely, 2^{20521530005199} is an apocalyptic number.

20521530005199 is a deficient number, since it is larger than the sum of its proper divisors (7572099283761).

20521530005199 is a wasteful number, since it uses less digits than its factorization.

20521530005199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788911.

The product of its (nonzero) digits is 121500, while the sum is 42.

The spelling of 20521530005199 in words is "twenty trillion, five hundred twenty-one billion, five hundred thirty million, five thousand, one hundred ninety-nine".