20247719799 has 4 divisors (see below), whose sum is σ = 26996959736. Its totient is φ = 13498479864.

The previous prime is 20247719783. The next prime is 20247719809. The reversal of 20247719799 is 99791774202.

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

It is not a de Polignac number, because 20247719799 - 2⁴ = 20247719783 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 (20247719749) 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, 3374619964 + ... + 3374619969.

It is an arithmetic number, because the mean of its divisors is an integer number (6749239934).

Almost surely, 2^20247719799 is an apocalyptic number.

20247719799 is a deficient number, since it is larger than the sum of its proper divisors (6749239937).

20247719799 is an equidigital number, since it uses as much as digits as its factorization.

20247719799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6749239936.

The product of its (nonzero) digits is 4000752, while the sum is 57.

The spelling of 20247719799 in words is "twenty billion, two hundred forty-seven million, seven hundred nineteen thousand, seven hundred ninety-nine".