15505205320 has 64 divisors (see below), whose sum is σ = 38071944000. Its totient is φ = 5636225280.

The previous prime is 15505205293. The next prime is 15505205321. The reversal of 15505205320 is 2350250551.

It is a super-2 number, since 2×15505205320² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15505205321) 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, 1799262 + ... + 1807858.

It is an arithmetic number, because the mean of its divisors is an integer number (594874125).

Almost surely, 2^15505205320 is an apocalyptic number.

15505205320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15505205320 is an abundant number, since it is smaller than the sum of its proper divisors (22566738680).

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

15505205320 is a wasteful number, since it uses less digits than its factorization.

15505205320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12718 (or 12714 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 28.

Adding to 15505205320 its reverse (2350250551), we get a palindrome (17855455871).

The spelling of 15505205320 in words is "fifteen billion, five hundred five million, two hundred five thousand, three hundred twenty".