20898452519999 has 4 divisors (see below), whose sum is σ = 21252663579720. Its totient is φ = 20544241460280.

The previous prime is 20898452519957. The next prime is 20898452520013. The reversal of 20898452519999 is 99991525489802.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20898452519999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20898452519929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177105529772 + ... + 177105529889.

It is an arithmetic number, because the mean of its divisors is an integer number (5313165894930).

Almost surely, 2^{20898452519999} is an apocalyptic number.

20898452519999 is a deficient number, since it is larger than the sum of its proper divisors (354211059721).

20898452519999 is an equidigital number, since it uses as much as digits as its factorization.

20898452519999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354211059720.

The product of its (nonzero) digits is 1511654400, while the sum is 80.

The spelling of 20898452519999 in words is "twenty trillion, eight hundred ninety-eight billion, four hundred fifty-two million, five hundred nineteen thousand, nine hundred ninety-nine".