20259271199 has 4 divisors (see below), whose sum is σ = 20536795536. Its totient is φ = 19981746864.

The previous prime is 20259271177. The next prime is 20259271213. The reversal of 20259271199 is 99117295202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99117295202 = 2 ⋅49558647601.

It is a cyclic number.

It is not a de Polignac number, because 20259271199 - 2⁸ = 20259270943 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 (20259271129) 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, 138762059 + ... + 138762204.

It is an arithmetic number, because the mean of its divisors is an integer number (5134198884).

Almost surely, 2^20259271199 is an apocalyptic number.

20259271199 is a deficient number, since it is larger than the sum of its proper divisors (277524337).

20259271199 is an equidigital number, since it uses as much as digits as its factorization.

20259271199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277524336.

The product of its (nonzero) digits is 204120, while the sum is 47.

The spelling of 20259271199 in words is "twenty billion, two hundred fifty-nine million, two hundred seventy-one thousand, one hundred ninety-nine".