21014404235 has 8 divisors (see below), whose sum is σ = 27509765616. Its totient is φ = 15283203040.

The previous prime is 21014404231. The next prime is 21014404253. The reversal of 21014404235 is 53240441012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21014404235 - 2² = 21014404231 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21014404231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191039984 + ... + 191040093.

It is an arithmetic number, because the mean of its divisors is an integer number (3438720702).

Almost surely, 2^21014404235 is an apocalyptic number.

21014404235 is a deficient number, since it is larger than the sum of its proper divisors (6495361381).

21014404235 is a wasteful number, since it uses less digits than its factorization.

21014404235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382080093.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 21014404235 its reverse (53240441012), we get a palindrome (74254845247).

The spelling of 21014404235 in words is "twenty-one billion, fourteen million, four hundred four thousand, two hundred thirty-five".