20489875199 has 4 divisors (see below), whose sum is σ = 20498475936. Its totient is φ = 20481274464.

The previous prime is 20489875183. The next prime is 20489875249. The reversal of 20489875199 is 99157898402.

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

It is a cyclic number.

It is not a de Polignac number, because 20489875199 - 2⁴ = 20489875183 is a prime.

It is a super-4 number, since 4×20489875199⁴ (a number of 42 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20489874199) 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, 4296794 + ... + 4301559.

It is an arithmetic number, because the mean of its divisors is an integer number (5124618984).

Almost surely, 2^20489875199 is an apocalyptic number.

20489875199 is a deficient number, since it is larger than the sum of its proper divisors (8600737).

20489875199 is an equidigital number, since it uses as much as digits as its factorization.

20489875199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8600736.

The product of its (nonzero) digits is 13063680, while the sum is 62.

The spelling of 20489875199 in words is "twenty billion, four hundred eighty-nine million, eight hundred seventy-five thousand, one hundred ninety-nine".