1045205020 has 24 divisors (see below), whose sum is σ = 2198091168. Its totient is φ = 417480000.

The previous prime is 1045205009. The next prime is 1045205027. The reversal of 1045205020 is 205025401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1045205027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23256 + ... + 51295.

It is an arithmetic number, because the mean of its divisors is an integer number (91587132).

Almost surely, 2^1045205020 is an apocalyptic number.

1045205020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1045205020 is an abundant number, since it is smaller than the sum of its proper divisors (1152886148).

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

1045205020 is a wasteful number, since it uses less digits than its factorization.

1045205020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75261 (or 75259 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 1045205020 is about 32329.6306814662. The cubic root of 1045205020 is about 1014.8468210201.

The spelling of 1045205020 in words is "one billion, forty-five million, two hundred five thousand, twenty".