13520253402 has 64 divisors (see below), whose sum is σ = 30888345600. Its totient is φ = 4381527600.

The previous prime is 13520253349. The next prime is 13520253403. The reversal of 13520253402 is 20435202531.

It is a happy number.

13520253402 is a `hidden beast` number, since 1 + 3 + 5 + 2 + 0 + 253 + 402 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (13520253403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 365599 + ... + 400877.

It is an arithmetic number, because the mean of its divisors is an integer number (482630400).

Almost surely, 2^13520253402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13520253402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15444172800).

13520253402 is an abundant number, since it is smaller than the sum of its proper divisors (17368092198).

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

13520253402 is a wasteful number, since it uses less digits than its factorization.

13520253402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35488 (or 35482 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 13520253402 its reverse (20435202531), we get a palindrome (33955455933).

The spelling of 13520253402 in words is "thirteen billion, five hundred twenty million, two hundred fifty-three thousand, four hundred two".