13220435660 has 24 divisors (see below), whose sum is σ = 27828877776. Its totient is φ = 5275609920.

The previous prime is 13220435653. The next prime is 13220435663. The reversal of 13220435660 is 6653402231.

It is not an unprimeable number, because it can be changed into a prime (13220435663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 776642 + ... + 793481.

It is an arithmetic number, because the mean of its divisors is an integer number (1159536574).

Almost surely, 2^13220435660 is an apocalyptic number.

13220435660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13220435660 is an abundant number, since it is smaller than the sum of its proper divisors (14608442116).

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

13220435660 is a wasteful number, since it uses less digits than its factorization.

13220435660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1570553 (or 1570551 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 13220435660 its reverse (6653402231), we get a palindrome (19873837891).

The spelling of 13220435660 in words is "thirteen billion, two hundred twenty million, four hundred thirty-five thousand, six hundred sixty".