13425543432021 has 16 divisors (see below), whose sum is σ = 20458048518144. Its totient is φ = 7671710013744.

The previous prime is 13425543431947. The next prime is 13425543432029. The reversal of 13425543432021 is 12023434552431.

It is a happy number.

It is not a de Polignac number, because 13425543432021 - 2³³ = 13416953497429 is a prime.

It is a super-2 number, since 2×13425543432021² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13425543432029) 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, 5262136 + ... + 7385198.

It is an arithmetic number, because the mean of its divisors is an integer number (1278628032384).

Almost surely, 2^{13425543432021} is an apocalyptic number.

It is an amenable number.

13425543432021 is a deficient number, since it is larger than the sum of its proper divisors (7032505086123).

13425543432021 is a wasteful number, since it uses less digits than its factorization.

13425543432021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2424200.

The product of its (nonzero) digits is 345600, while the sum is 39.

Adding to 13425543432021 its reverse (12023434552431), we get a palindrome (25448977984452).

The spelling of 13425543432021 in words is "thirteen trillion, four hundred twenty-five billion, five hundred forty-three million, four hundred thirty-two thousand, twenty-one".