21435254320441 has 32 divisors (see below), whose sum is σ = 23351947557120. Its totient is φ = 19557579734784.

The previous prime is 21435254320433. The next prime is 21435254320451. The reversal of 21435254320441 is 14402345253412.

It is not a de Polignac number, because 21435254320441 - 2³ = 21435254320433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21435254320394 and 21435254320403.

It is not an unprimeable number, because it can be changed into a prime (21435254320451) 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, 1658683806 + ... + 1658696728.

It is an arithmetic number, because the mean of its divisors is an integer number (729748361160).

Almost surely, 2^{21435254320441} is an apocalyptic number.

It is an amenable number.

21435254320441 is a deficient number, since it is larger than the sum of its proper divisors (1916693236679).

21435254320441 is a wasteful number, since it uses less digits than its factorization.

21435254320441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15265.

The product of its (nonzero) digits is 460800, while the sum is 40.

Adding to 21435254320441 its reverse (14402345253412), we get a palindrome (35837599573853).

The spelling of 21435254320441 in words is "twenty-one trillion, four hundred thirty-five billion, two hundred fifty-four million, three hundred twenty thousand, four hundred forty-one".