1020009500 has 24 divisors (see below), whose sum is σ = 2227701840. Its totient is φ = 408003600.

The previous prime is 1020009491. The next prime is 1020009553. The reversal of 1020009500 is 59000201.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1019510 + ... + 1020509.

It is an arithmetic number, because the mean of its divisors is an integer number (92820910).

Almost surely, 2^1020009500 is an apocalyptic number.

1020009500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020009500 is an abundant number, since it is smaller than the sum of its proper divisors (1207692340).

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

1020009500 is a wasteful number, since it uses less digits than its factorization.

1020009500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040038 (or 2040026 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 1020009500 is about 31937.5875732655. The cubic root of 1020009500 is about 1006.6258346863.

Adding to 1020009500 its reverse (59000201), we get a palindrome (1079009701).

The spelling of 1020009500 in words is "one billion, twenty million, nine thousand, five hundred".