4045138020 has 144 divisors (see below), whose sum is σ = 15298028928. Its totient is φ = 840545280.

The previous prime is 4045137997. The next prime is 4045138037. The reversal of 4045138020 is 208315404.

4045138020 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 132069 + ... + 159788.

It is an arithmetic number, because the mean of its divisors is an integer number (106236312).

Almost surely, 2^4045138020 is an apocalyptic number.

It is an amenable number.

4045138020 is an abundant number, since it is smaller than the sum of its proper divisors (11252890908).

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

4045138020 is a wasteful number, since it uses less digits than its factorization.

4045138020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291890 (or 291885 counting only the distinct ones).

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

The square root of 4045138020 is about 63601.3995129038. The cubic root of 4045138020 is about 1593.3497434551.

The spelling of 4045138020 in words is "four billion, forty-five million, one hundred thirty-eight thousand, twenty".