20200349991 has 8 divisors (see below), whose sum is σ = 27010975600. Its totient is φ = 13428312192.

The previous prime is 20200349969. The next prime is 20200349999. The reversal of 20200349991 is 19994300202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20200349991 - 2⁹ = 20200349479 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 (20200349999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9645730 + ... + 9647823.

It is an arithmetic number, because the mean of its divisors is an integer number (3376371950).

Almost surely, 2^20200349991 is an apocalyptic number.

20200349991 is a deficient number, since it is larger than the sum of its proper divisors (6810625609).

20200349991 is a wasteful number, since it uses less digits than its factorization.

20200349991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19293905.

The product of its (nonzero) digits is 34992, while the sum is 39.

The spelling of 20200349991 in words is "twenty billion, two hundred million, three hundred forty-nine thousand, nine hundred ninety-one".