20085350985 has 24 divisors (see below), whose sum is σ = 39788124480. Its totient is φ = 9181874592.

The previous prime is 20085350983. The next prime is 20085350993. The reversal of 20085350985 is 58905358002.

20085350985 is a `hidden beast` number, since 20 + 0 + 8 + 535 + 0 + 98 + 5 = 666.

It is not a de Polignac number, because 20085350985 - 2¹ = 20085350983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 20085350985.

It is not an unprimeable number, because it can be changed into a prime (20085350983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31881195 + ... + 31881824.

It is an arithmetic number, because the mean of its divisors is an integer number (1657838520).

Almost surely, 2^20085350985 is an apocalyptic number.

It is an amenable number.

20085350985 is a deficient number, since it is larger than the sum of its proper divisors (19702773495).

20085350985 is a wasteful number, since it uses less digits than its factorization.

20085350985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63763037 (or 63763034 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 45.

The spelling of 20085350985 in words is "twenty billion, eighty-five million, three hundred fifty thousand, nine hundred eighty-five".