20491741609250 has 32 divisors (see below), whose sum is σ = 40617042671088. Its totient is φ = 7714538016000.

The previous prime is 20491741609247. The next prime is 20491741609259. The reversal of 20491741609250 is 5290614719402.

It can be written as a sum of positive squares in 8 ways, for example, as 3253791845929 + 17237949763321 = 1803827^2 + 4151861^2 .

It is a super-2 number, since 2×20491741609250² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is not an unprimeable number, because it can be changed into a prime (20491741609259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2410788881 + ... + 2410797380.

Almost surely, 2^{20491741609250} is an apocalyptic number.

20491741609250 is a deficient number, since it is larger than the sum of its proper divisors (20125301061838).

20491741609250 is a wasteful number, since it uses less digits than its factorization.

20491741609250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4821586295 (or 4821586285 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 20491741609250 in words is "twenty trillion, four hundred ninety-one billion, seven hundred forty-one million, six hundred nine thousand, two hundred fifty".