13635220140 has 72 divisors (see below), whose sum is σ = 41369812848. Its totient is φ = 3635210880.

The previous prime is 13635220133. The next prime is 13635220171. The reversal of 13635220140 is 4102253631.

13635220140 is a `hidden beast` number, since 1 + 3 + 635 + 2 + 20 + 1 + 4 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1314414 + ... + 1324746.

It is an arithmetic number, because the mean of its divisors is an integer number (574580734).

Almost surely, 2^13635220140 is an apocalyptic number.

13635220140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13635220140 is an abundant number, since it is smaller than the sum of its proper divisors (27734592708).

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

13635220140 is a wasteful number, since it uses less digits than its factorization.

13635220140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17679 (or 17674 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 13635220140 its reverse (4102253631), we get a palindrome (17737473771).

The spelling of 13635220140 in words is "thirteen billion, six hundred thirty-five million, two hundred twenty thousand, one hundred forty".