20147085 has 36 divisors (see below), whose sum is σ = 40627548. Its totient is φ = 9209088.

The previous prime is 20147063. The next prime is 20147089. The reversal of 20147085 is 58074102.

It can be written as a sum of positive squares in 2 ways, for example, as 2683044 + 17464041 = 1638^2 + 4179^2 .

It is not a de Polignac number, because 20147085 - 2⁶ = 20147021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20147089) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2364 + ... + 6773.

It is an arithmetic number, because the mean of its divisors is an integer number (1128543).

Almost surely, 2^20147085 is an apocalyptic number.

It is an amenable number.

20147085 is an abundant number, since it is smaller than the sum of its proper divisors (20480463).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20147085 is a wasteful number, since it uses less digits than its factorization.

20147085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9162 (or 9152 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 20147085 is about 4488.5504341602. The cubic root of 20147085 is about 272.1055539362.

The spelling of 20147085 in words is "twenty million, one hundred forty-seven thousand, eighty-five".