21250935 has 24 divisors (see below), whose sum is σ = 39003120. Its totient is φ = 10666752.

The previous prime is 21250877. The next prime is 21250961. The reversal of 21250935 is 53905212.

It is not a de Polignac number, because 21250935 - 2⁷ = 21250807 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21250899 and 21250908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13125 + ... + 14654.

It is an arithmetic number, because the mean of its divisors is an integer number (1625130).

Almost surely, 2^21250935 is an apocalyptic number.

21250935 is a deficient number, since it is larger than the sum of its proper divisors (17752185).

21250935 is a wasteful number, since it uses less digits than its factorization.

21250935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27807 (or 27804 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 21250935 is about 4609.8736425199. The cubic root of 21250935 is about 276.9869751942.

The spelling of 21250935 in words is "twenty-one million, two hundred fifty thousand, nine hundred thirty-five".