20049997819 has 8 divisors (see below), whose sum is σ = 20357775360. Its totient is φ = 19744395816.

The previous prime is 20049997777. The next prime is 20049997841. The reversal of 20049997819 is 91879994002.

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

It is a cyclic number.

It is not a de Polignac number, because 20049997819 - 2⁷ = 20049997691 is a prime.

It is a super-2 number, since 2×20049997819² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20049907819) 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, 525307 + ... + 562180.

It is an arithmetic number, because the mean of its divisors is an integer number (2544721920).

Almost surely, 2^20049997819 is an apocalyptic number.

20049997819 is a deficient number, since it is larger than the sum of its proper divisors (307777541).

20049997819 is a wasteful number, since it uses less digits than its factorization.

20049997819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1087769.

The product of its (nonzero) digits is 2939328, while the sum is 58.

The spelling of 20049997819 in words is "twenty billion, forty-nine million, nine hundred ninety-seven thousand, eight hundred nineteen".