20085935121 has 64 divisors (see below), whose sum is σ = 36631511040. Its totient is φ = 10624426560.

The previous prime is 20085935117. The next prime is 20085935141. The reversal of 20085935121 is 12153958002.

20085935121 is a `hidden beast` number, since 200 + 85 + 9 + 351 + 21 = 666.

It is not a de Polignac number, because 20085935121 - 2² = 20085935117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20085935141) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 60231 + ... + 209283.

It is an arithmetic number, because the mean of its divisors is an integer number (572367360).

Almost surely, 2^20085935121 is an apocalyptic number.

20085935121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20085935121 is a deficient number, since it is larger than the sum of its proper divisors (16545575919).

20085935121 is a wasteful number, since it uses less digits than its factorization.

20085935121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149123 (or 149117 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The spelling of 20085935121 in words is "twenty billion, eighty-five million, nine hundred thirty-five thousand, one hundred twenty-one".