21077935 has 8 divisors (see below), whose sum is σ = 26624880. Its totient is φ = 15974784.

The previous prime is 21077929. The next prime is 21077951. The reversal of 21077935 is 53977012.

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

It is a cyclic number.

It is not a de Polignac number, because 21077935 - 2¹⁹ = 20553647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21077935.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110842 + ... + 111031.

It is an arithmetic number, because the mean of its divisors is an integer number (3328110).

Almost surely, 2^21077935 is an apocalyptic number.

21077935 is a deficient number, since it is larger than the sum of its proper divisors (5546945).

21077935 is a wasteful number, since it uses less digits than its factorization.

21077935 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221897.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 21077935 is about 4591.0712257598. The cubic root of 21077935 is about 276.2332927387.

The spelling of 21077935 in words is "twenty-one million, seventy-seven thousand, nine hundred thirty-five".