21037741 has 8 divisors (see below), whose sum is σ = 21465144. Its totient is φ = 20613120.

The previous prime is 21037739. The next prime is 21037771. The reversal of 21037741 is 14773012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1932100 + 19105641 = 1390^2 + 4371^2 .

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

It is not a de Polignac number, because 21037741 - 2¹ = 21037739 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21037771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21045 + ... + 22021.

It is an arithmetic number, because the mean of its divisors is an integer number (2683143).

Almost surely, 2^21037741 is an apocalyptic number.

It is an amenable number.

21037741 is a deficient number, since it is larger than the sum of its proper divisors (427403).

21037741 is an equidigital number, since it uses as much as digits as its factorization.

21037741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 21037741 is about 4586.6917271602. The cubic root of 21037741 is about 276.0575958005.

The spelling of 21037741 in words is "twenty-one million, thirty-seven thousand, seven hundred forty-one".