21119741 has 4 divisors (see below), whose sum is σ = 21155484. Its totient is φ = 21084000.

The previous prime is 21119737. The next prime is 21119759. The reversal of 21119741 is 14791112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13579225 + 7540516 = 3685^2 + 2746^2 .

It is a cyclic number.

It is not a de Polignac number, because 21119741 - 2² = 21119737 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 21119741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21119701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16970 + ... + 18171.

It is an arithmetic number, because the mean of its divisors is an integer number (5288871).

Almost surely, 2^21119741 is an apocalyptic number.

It is an amenable number.

21119741 is a deficient number, since it is larger than the sum of its proper divisors (35743).

21119741 is an equidigital number, since it uses as much as digits as its factorization.

21119741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35742.

The product of its digits is 504, while the sum is 26.

The square root of 21119741 is about 4595.6219383235. The cubic root of 21119741 is about 276.4157992718.

The spelling of 21119741 in words is "twenty-one million, one hundred nineteen thousand, seven hundred forty-one".