20061685 has 16 divisors (see below), whose sum is σ = 27666432. Its totient is φ = 13680000.

The previous prime is 20061673. The next prime is 20061737. The reversal of 20061685 is 58616002.

It is not a de Polignac number, because 20061685 - 2⁵ = 20061653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5185 + ... + 8185.

It is an arithmetic number, because the mean of its divisors is an integer number (1729152).

Almost surely, 2^20061685 is an apocalyptic number.

It is an amenable number.

20061685 is a deficient number, since it is larger than the sum of its proper divisors (7604747).

20061685 is a wasteful number, since it uses less digits than its factorization.

20061685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3204.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 20061685 is about 4479.0272381400. The cubic root of 20061685 is about 271.7205399994.

Adding to 20061685 its reverse (58616002), we get a palindrome (78677687).

The spelling of 20061685 in words is "twenty million, sixty-one thousand, six hundred eighty-five".