1020545500 has 48 divisors (see below), whose sum is σ = 2400338304. Its totient is φ = 376814400.

The previous prime is 1020545497. The next prime is 1020545503. The reversal of 1020545500 is 55450201.

It is an interprime number because it is at equal distance from previous prime (1020545497) and next prime (1020545503).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020545503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72004 + ... + 85003.

It is an arithmetic number, because the mean of its divisors is an integer number (50007048).

Almost surely, 2^1020545500 is an apocalyptic number.

1020545500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020545500 is an abundant number, since it is smaller than the sum of its proper divisors (1379792804).

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

1020545500 is a wasteful number, since it uses less digits than its factorization.

1020545500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157039 (or 157027 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 1020545500 is about 31945.9778375933. The cubic root of 1020545500 is about 1006.8021261705.

Adding to 1020545500 its reverse (55450201), we get a palindrome (1075995701).

The spelling of 1020545500 in words is "one billion, twenty million, five hundred forty-five thousand, five hundred".