20359921799 has 4 divisors (see below), whose sum is σ = 23268482064. Its totient is φ = 17451361536.

The previous prime is 20359921741. The next prime is 20359921807. The reversal of 20359921799 is 99712995302.

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

It is not a de Polignac number, because 20359921799 - 2¹⁶ = 20359856263 is a prime.

It is a super-2 number, since 2×20359921799² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20359921199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1454280122 + ... + 1454280135.

It is an arithmetic number, because the mean of its divisors is an integer number (5817120516).

Almost surely, 2^20359921799 is an apocalyptic number.

20359921799 is a deficient number, since it is larger than the sum of its proper divisors (2908560265).

20359921799 is an equidigital number, since it uses as much as digits as its factorization.

20359921799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2908560264.

The product of its (nonzero) digits is 2755620, while the sum is 56.

The spelling of 20359921799 in words is "twenty billion, three hundred fifty-nine million, nine hundred twenty-one thousand, seven hundred ninety-nine".