1009255020 has 48 divisors (see below), whose sum is σ = 2861698560. Its totient is φ = 265726656.

The previous prime is 1009254877. The next prime is 1009255033. The reversal of 1009255020 is 205529001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101722 + ... + 111201.

It is an arithmetic number, because the mean of its divisors is an integer number (59618720).

Almost surely, 2^1009255020 is an apocalyptic number.

1009255020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1009255020 is an abundant number, since it is smaller than the sum of its proper divisors (1852443540).

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

1009255020 is a wasteful number, since it uses less digits than its factorization.

1009255020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213014 (or 213012 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 1009255020 is about 31768.7742917475. The cubic root of 1009255020 is about 1003.0755380354.

The spelling of 1009255020 in words is "one billion, nine million, two hundred fifty-five thousand, twenty".