2020840685 has 16 divisors (see below), whose sum is σ = 2484983424. Its totient is φ = 1576798272.

The previous prime is 2020840681. The next prime is 2020840687. The reversal of 2020840685 is 5860480202.

It is a cyclic number.

It is not a de Polignac number, because 2020840685 - 2² = 2020840681 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020840681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151184 + ... + 164006.

It is an arithmetic number, because the mean of its divisors is an integer number (155311464).

Almost surely, 2^2020840685 is an apocalyptic number.

It is an amenable number.

2020840685 is a deficient number, since it is larger than the sum of its proper divisors (464142739).

2020840685 is a wasteful number, since it uses less digits than its factorization.

2020840685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13604.

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 2020840685 is about 44953.7616334829. The cubic root of 2020840685 is about 1264.2822061647.

The spelling of 2020840685 in words is "two billion, twenty million, eight hundred forty thousand, six hundred eighty-five".