13535404421 has 16 divisors (see below), whose sum is σ = 17267762688. Its totient is φ = 10301785200.

The previous prime is 13535404411. The next prime is 13535404439. The reversal of 13535404421 is 12440453531.

It is a de Polignac number, because none of the positive numbers 2^k-13535404421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13535404411) 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, 2040695 + ... + 2047316.

It is an arithmetic number, because the mean of its divisors is an integer number (1079235168).

Almost surely, 2^13535404421 is an apocalyptic number.

13535404421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13535404421 is a deficient number, since it is larger than the sum of its proper divisors (3732358267).

13535404421 is a wasteful number, since it uses less digits than its factorization.

13535404421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4088072.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 13535404421 its reverse (12440453531), we get a palindrome (25975857952).

The spelling of 13535404421 in words is "thirteen billion, five hundred thirty-five million, four hundred four thousand, four hundred twenty-one".