20091936244 has 24 divisors (see below), whose sum is σ = 35771191400. Its totient is φ = 9871908480.

The previous prime is 20091936239. The next prime is 20091936247. The reversal of 20091936244 is 44263919002.

It can be written as a sum of positive squares in 4 ways, for example, as 1599200100 + 18492736144 = 39990^2 + 135988^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20091936197 and 20091936206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20091936247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222322 + ... + 299350.

Almost surely, 2^20091936244 is an apocalyptic number.

It is an amenable number.

20091936244 is a deficient number, since it is larger than the sum of its proper divisors (15679255156).

20091936244 is a wasteful number, since it uses less digits than its factorization.

20091936244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78163 (or 78161 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 40.

The spelling of 20091936244 in words is "twenty billion, ninety-one million, nine hundred thirty-six thousand, two hundred forty-four".