4235436406021 has 4 divisors (see below), whose sum is σ = 4277371420044. Its totient is φ = 4193501392000.

The previous prime is 4235436406007. The next prime is 4235436406027. The reversal of 4235436406021 is 1206046345324.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3788905073121 + 446531332900 = 1946511^2 + 668230^2 .

It is a cyclic number.

It is not a de Polignac number, because 4235436406021 - 2⁹ = 4235436405509 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4235436406027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20967506860 + ... + 20967507061.

It is an arithmetic number, because the mean of its divisors is an integer number (1069342855011).

Almost surely, 2^{4235436406021} is an apocalyptic number.

It is an amenable number.

4235436406021 is a deficient number, since it is larger than the sum of its proper divisors (41935014023).

4235436406021 is a wasteful number, since it uses less digits than its factorization.

4235436406021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41935014022.

The product of its (nonzero) digits is 414720, while the sum is 40.

The spelling of 4235436406021 in words is "four trillion, two hundred thirty-five billion, four hundred thirty-six million, four hundred six thousand, twenty-one".