20085390 has 48 divisors (see below), whose sum is σ = 56242368. Its totient is φ = 4943808.

The previous prime is 20085383. The next prime is 20085397. The reversal of 20085390 is 9358002.

It is an interprime number because it is at equal distance from previous prime (20085383) and next prime (20085397).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20085397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7414 + ... + 9753.

It is an arithmetic number, because the mean of its divisors is an integer number (1171716).

Almost surely, 2^20085390 is an apocalyptic number.

20085390 is an abundant number, since it is smaller than the sum of its proper divisors (36156978).

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

20085390 is a wasteful number, since it uses less digits than its factorization.

20085390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17193 (or 17190 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 20085390 is about 4481.6726788109. The cubic root of 20085390 is about 271.8275200479.

The spelling of 20085390 in words is "twenty million, eighty-five thousand, three hundred ninety".