235632641421 has 32 divisors (see below), whose sum is σ = 336791347200. Its totient is φ = 146012154624.

The previous prime is 235632641417. The next prime is 235632641443. The reversal of 235632641421 is 124146236532.

It is not a de Polignac number, because 235632641421 - 2² = 235632641417 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 235632641421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (235632641521) 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, 13380180 + ... + 13397778.

It is an arithmetic number, because the mean of its divisors is an integer number (10524729600).

Almost surely, 2^235632641421 is an apocalyptic number.

It is an amenable number.

235632641421 is a deficient number, since it is larger than the sum of its proper divisors (101158705779).

235632641421 is a wasteful number, since it uses less digits than its factorization.

235632641421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20865.

The product of its digits is 207360, while the sum is 39.

Adding to 235632641421 its reverse (124146236532), we get a palindrome (359778877953).

The spelling of 235632641421 in words is "two hundred thirty-five billion, six hundred thirty-two million, six hundred forty-one thousand, four hundred twenty-one".