13520021230 has 32 divisors (see below), whose sum is σ = 25514569728. Its totient is φ = 5148343200.

The previous prime is 13520021209. The next prime is 13520021231. The reversal of 13520021230 is 3212002531.

It is a junction number, because it is equal to n+sod(n) for n = 13520021198 and 13520021207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13520021231) 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, 90766 + ... + 187825.

It is an arithmetic number, because the mean of its divisors is an integer number (797330304).

Almost surely, 2^13520021230 is an apocalyptic number.

13520021230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13520021230 is a deficient number, since it is larger than the sum of its proper divisors (11994548498).

13520021230 is a wasteful number, since it uses less digits than its factorization.

13520021230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278832.

The product of its (nonzero) digits is 360, while the sum is 19.

Adding to 13520021230 its reverse (3212002531), we get a palindrome (16732023761).

The spelling of 13520021230 in words is "thirteen billion, five hundred twenty million, twenty-one thousand, two hundred thirty".