21734741 has 4 divisors (see below), whose sum is σ = 24839712. Its totient is φ = 18629772.

The previous prime is 21734731. The next prime is 21734749. The reversal of 21734741 is 14743712.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21734741 - 2¹⁰ = 21733717 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 (21734749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1552475 + ... + 1552488.

It is an arithmetic number, because the mean of its divisors is an integer number (6209928).

Almost surely, 2^21734741 is an apocalyptic number.

It is an amenable number.

21734741 is a deficient number, since it is larger than the sum of its proper divisors (3104971).

21734741 is an equidigital number, since it uses as much as digits as its factorization.

21734741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3104970.

The product of its digits is 4704, while the sum is 29.

The square root of 21734741 is about 4662.0533029986. The cubic root of 21734741 is about 279.0732155413.

The spelling of 21734741 in words is "twenty-one million, seven hundred thirty-four thousand, seven hundred forty-one".