20641851596149 has 16 divisors (see below), whose sum is σ = 24228560591488. Its totient is φ = 17214622189632.

The previous prime is 20641851596147. The next prime is 20641851596183. The reversal of 20641851596149 is 94169515814602.

It is not a de Polignac number, because 20641851596149 - 2¹ = 20641851596147 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20641851596147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23859619 + ... + 24709615.

It is an arithmetic number, because the mean of its divisors is an integer number (1514285036968).

Almost surely, 2^{20641851596149} is an apocalyptic number.

It is an amenable number.

20641851596149 is a deficient number, since it is larger than the sum of its proper divisors (3586708995339).

20641851596149 is an equidigital number, since it uses as much as digits as its factorization.

20641851596149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943804.

The product of its (nonzero) digits is 18662400, while the sum is 61.

The spelling of 20641851596149 in words is "twenty trillion, six hundred forty-one billion, eight hundred fifty-one million, five hundred ninety-six thousand, one hundred forty-nine".