20190939746 has 16 divisors (see below), whose sum is σ = 32398565976. Its totient is φ = 9403662336.

The previous prime is 20190939733. The next prime is 20190939749. The reversal of 20190939746 is 64793909102.

It can be written as a sum of positive squares in 4 ways, for example, as 19020547225 + 1170392521 = 137915^2 + 34211^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20190939694 and 20190939703.

It is not an unprimeable number, because it can be changed into a prime (20190939749) 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 7 ways as a sum of consecutive naturals, for example, 3057791 + ... + 3064386.

Almost surely, 2^20190939746 is an apocalyptic number.

20190939746 is a deficient number, since it is larger than the sum of its proper divisors (12207626230).

20190939746 is a wasteful number, since it uses less digits than its factorization.

20190939746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6122293.

The product of its (nonzero) digits is 734832, while the sum is 50.

The spelling of 20190939746 in words is "twenty billion, one hundred ninety million, nine hundred thirty-nine thousand, seven hundred forty-six".