65530020 has 48 divisors (see below), whose sum is σ = 186234048. Its totient is φ = 17212800.

The previous prime is 65530009. The next prime is 65530027. The reversal of 65530020 is 2003556.

It is not an unprimeable number, because it can be changed into a prime (65530027) 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, 4131 + ... + 12170.

It is an arithmetic number, because the mean of its divisors is an integer number (3879876).

Almost surely, 2^65530020 is an apocalyptic number.

65530020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65530020 is an abundant number, since it is smaller than the sum of its proper divisors (120704028).

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

65530020 is a wasteful number, since it uses less digits than its factorization.

65530020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16380 (or 16378 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 65530020 is about 8095.0614574566. The cubic root of 65530020 is about 403.1624726899.

Adding to 65530020 its reverse (2003556), we get a palindrome (67533576).

The spelling of 65530020 in words is "sixty-five million, five hundred thirty thousand, twenty".