1020500664 has 32 divisors (see below), whose sum is σ = 2555707920. Its totient is φ = 339572736.

The previous prime is 1020500647. The next prime is 1020500669. The reversal of 1020500664 is 4660050201.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22999 + ... + 50694.

Almost surely, 2^1020500664 is an apocalyptic number.

It is an amenable number.

1020500664 is an abundant number, since it is smaller than the sum of its proper divisors (1535207256).

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

1020500664 is a wasteful number, since it uses less digits than its factorization.

1020500664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74279 (or 74275 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1020500664 is about 31945.2760827012. The cubic root of 1020500664 is about 1006.7873818855.

Adding to 1020500664 its reverse (4660050201), we get a palindrome (5680550865).

The spelling of 1020500664 in words is "one billion, twenty million, five hundred thousand, six hundred sixty-four".