2020123845 has 12 divisors (see below), whose sum is σ = 3501548076. Its totient is φ = 1077399360.

The previous prime is 2020123813. The next prime is 2020123943. The reversal of 2020123845 is 5483210202.

It can be written as a sum of positive squares in 2 ways, for example, as 1557959841 + 462164004 = 39471^2 + 21498^2 .

It is not a de Polignac number, because 2020123845 - 2⁵ = 2020123813 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22445776 + ... + 22445865.

It is an arithmetic number, because the mean of its divisors is an integer number (291795673).

Almost surely, 2^2020123845 is an apocalyptic number.

It is an amenable number.

2020123845 is a deficient number, since it is larger than the sum of its proper divisors (1481424231).

2020123845 is a wasteful number, since it uses less digits than its factorization.

2020123845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44891652 (or 44891649 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 2020123845 is about 44945.7878449138. The cubic root of 2020123845 is about 1264.1326982156.

The spelling of 2020123845 in words is "two billion, twenty million, one hundred twenty-three thousand, eight hundred forty-five".