2020232809 has 9 divisors (see below), whose sum is σ = 2350432791. Its totient is φ = 1731358440.

The previous prime is 2020232803. The next prime is 2020232813. The reversal of 2020232809 is 9082320202.

The square root of 2020232809 is 44947.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 559464409 + 1460768400 = 23653^2 + 38220^2 .

It is not a de Polignac number, because 2020232809 - 2⁵ = 2020232777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2020232803) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 311419 + ... + 317839.

It is an arithmetic number, because the mean of its divisors is an integer number (261159199).

Almost surely, 2^2020232809 is an apocalyptic number.

2020232809 is the 44947-th square number.

2020232809 is the 22474-th centered octagonal number.

It is an amenable number.

2020232809 is a deficient number, since it is larger than the sum of its proper divisors (330199982).

2020232809 is an frugal number, since it uses more digits than its factorization.

2020232809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12856 (or 6428 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The cubic root of 2020232809 is about 1264.1554266042.

The spelling of 2020232809 in words is "two billion, twenty million, two hundred thirty-two thousand, eight hundred nine".