21349935 has 12 divisors (see below), whose sum is σ = 37006632. Its totient is φ = 11386608.

The previous prime is 21349907. The next prime is 21349963. The reversal of 21349935 is 53994312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21349907) and next prime (21349963).

It is not a de Polignac number, because 21349935 - 2⁶ = 21349871 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21349935.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 237177 + ... + 237266.

It is an arithmetic number, because the mean of its divisors is an integer number (3083886).

Almost surely, 2^21349935 is an apocalyptic number.

21349935 is a deficient number, since it is larger than the sum of its proper divisors (15656697).

21349935 is a wasteful number, since it uses less digits than its factorization.

21349935 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474454 (or 474451 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 21349935 is about 4620.5989871444. The cubic root of 21349935 is about 277.4164345408.

The spelling of 21349935 in words is "twenty-one million, three hundred forty-nine thousand, nine hundred thirty-five".