1020500663 has 16 divisors (see below), whose sum is σ = 1289951040. Its totient is φ = 785604096.

The previous prime is 1020500647. The next prime is 1020500669. The reversal of 1020500663 is 3660050201.

It is a cyclic number.

It is not a de Polignac number, because 1020500663 - 2⁴ = 1020500647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020500669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148178 + ... + 154911.

It is an arithmetic number, because the mean of its divisors is an integer number (80621940).

Almost surely, 2^1020500663 is an apocalyptic number.

1020500663 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1020500663 is a deficient number, since it is larger than the sum of its proper divisors (269450377).

1020500663 is a wasteful number, since it uses less digits than its factorization.

1020500663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303146.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 1020500663 is about 31945.2760670494. The cubic root of 1020500663 is about 1006.7873815567.

Adding to 1020500663 its reverse (3660050201), we get a palindrome (4680550864).

The spelling of 1020500663 in words is "one billion, twenty million, five hundred thousand, six hundred sixty-three".