21190935 has 32 divisors (see below), whose sum is σ = 35665920. Its totient is φ = 10723328.

The previous prime is 21190933. The next prime is 21190957. The reversal of 21190935 is 53909112.

It is a cyclic number.

It is not a de Polignac number, because 21190935 - 2¹ = 21190933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21190933) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82327 + ... + 82583.

It is an arithmetic number, because the mean of its divisors is an integer number (1114560).

Almost surely, 2^21190935 is an apocalyptic number.

21190935 is a deficient number, since it is larger than the sum of its proper divisors (14474985).

21190935 is a wasteful number, since it uses less digits than its factorization.

21190935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527.

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 21190935 is about 4603.3612719403. The cubic root of 21190935 is about 276.7260473178.

The spelling of 21190935 in words is "twenty-one million, one hundred ninety thousand, nine hundred thirty-five".