21014433235 has 16 divisors (see below), whose sum is σ = 25905816000. Its totient is φ = 16352793216.

The previous prime is 21014433211. The next prime is 21014433239. The reversal of 21014433235 is 53233441012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21014433235 - 2⁹ = 21014432723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21014433239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 791506 + ... + 817624.

It is an arithmetic number, because the mean of its divisors is an integer number (1619113500).

Almost surely, 2^21014433235 is an apocalyptic number.

21014433235 is a deficient number, since it is larger than the sum of its proper divisors (4891382765).

21014433235 is a wasteful number, since it uses less digits than its factorization.

21014433235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30510.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 21014433235 its reverse (53233441012), we get a palindrome (74247874247).

The spelling of 21014433235 in words is "twenty-one billion, fourteen million, four hundred thirty-three thousand, two hundred thirty-five".