20156001085 has 16 divisors (see below), whose sum is σ = 26389929600. Its totient is φ = 14656747840.

The previous prime is 20156001013. The next prime is 20156001143. The reversal of 20156001085 is 58010065102.

It is not a de Polignac number, because 20156001085 - 2⁷ = 20156000957 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 414144 + ... + 460246.

It is an arithmetic number, because the mean of its divisors is an integer number (1649370600).

Almost surely, 2^20156001085 is an apocalyptic number.

It is an amenable number.

20156001085 is a deficient number, since it is larger than the sum of its proper divisors (6233928515).

20156001085 is a wasteful number, since it uses less digits than its factorization.

20156001085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54068.

The product of its (nonzero) digits is 2400, while the sum is 28.

Adding to 20156001085 its reverse (58010065102), we get a palindrome (78166066187).

The spelling of 20156001085 in words is "twenty billion, one hundred fifty-six million, one thousand, eighty-five".