20011209999896 has 16 divisors (see below), whose sum is σ = 37885300486800. Its totient is φ = 9908463203424.

The previous prime is 20011209999871. The next prime is 20011209999899. The reversal of 20011209999896 is 69899990211002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011209999899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12142723691 + ... + 12142725338.

It is an arithmetic number, because the mean of its divisors is an integer number (2367831280425).

Almost surely, 2^{20011209999896} is an apocalyptic number.

It is an amenable number.

20011209999896 is a deficient number, since it is larger than the sum of its proper divisors (17874090486904).

20011209999896 is a wasteful number, since it uses less digits than its factorization.

20011209999896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24285449138 (or 24285449134 counting only the distinct ones).

The product of its (nonzero) digits is 11337408, while the sum is 65.

The spelling of 20011209999896 in words is "twenty trillion, eleven billion, two hundred nine million, nine hundred ninety-nine thousand, eight hundred ninety-six".