20349633899 has 6 divisors (see below), whose sum is σ = 23672023164. Its totient is φ = 17442543300.

The previous prime is 20349633881. The next prime is 20349633907. The reversal of 20349633899 is 99833694302.

It is not a de Polignac number, because 20349633899 - 2⁸ = 20349633643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20349633299) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 207649277 + ... + 207649374.

It is an arithmetic number, because the mean of its divisors is an integer number (3945337194).

Almost surely, 2^20349633899 is an apocalyptic number.

20349633899 is a deficient number, since it is larger than the sum of its proper divisors (3322389265).

20349633899 is an equidigital number, since it uses as much as digits as its factorization.

20349633899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415298665 (or 415298658 counting only the distinct ones).

The product of its (nonzero) digits is 7558272, while the sum is 56.

The spelling of 20349633899 in words is "twenty billion, three hundred forty-nine million, six hundred thirty-three thousand, eight hundred ninety-nine".