20085345 has 36 divisors (see below), whose sum is σ = 40503060. Its totient is φ = 9180864.

The previous prime is 20085323. The next prime is 20085353. The reversal of 20085345 is 54358002.

It can be written as a sum of positive squares in 2 ways, for example, as 4498641 + 15586704 = 2121^2 + 3948^2 .

It is not a de Polignac number, because 20085345 - 2⁸ = 20085089 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2350 + ... + 6759.

It is an arithmetic number, because the mean of its divisors is an integer number (1125085).

Almost surely, 2^20085345 is an apocalyptic number.

It is an amenable number.

20085345 is an abundant number, since it is smaller than the sum of its proper divisors (20417715).

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

20085345 is a wasteful number, since it uses less digits than its factorization.

20085345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9134 (or 9124 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 20085345 is about 4481.6676583611. The cubic root of 20085345 is about 271.8273170438.

The spelling of 20085345 in words is "twenty million, eighty-five thousand, three hundred forty-five".