21049338935 has 4 divisors (see below), whose sum is σ = 25259206728. Its totient is φ = 16839471144.

The previous prime is 21049338929. The next prime is 21049338941. The reversal of 21049338935 is 53983394012.

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

It is an interprime number because it is at equal distance from previous prime (21049338929) and next prime (21049338941).

It is a cyclic number.

It is not a de Polignac number, because 21049338935 - 2¹⁸ = 21049076791 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21049338935.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2104933889 + ... + 2104933898.

It is an arithmetic number, because the mean of its divisors is an integer number (6314801682).

Almost surely, 2^21049338935 is an apocalyptic number.

21049338935 is a deficient number, since it is larger than the sum of its proper divisors (4209867793).

21049338935 is an equidigital number, since it uses as much as digits as its factorization.

21049338935 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4209867792.

The product of its (nonzero) digits is 699840, while the sum is 47.

The spelling of 21049338935 in words is "twenty-one billion, forty-nine million, three hundred thirty-eight thousand, nine hundred thirty-five".