21734710 has 16 divisors (see below), whose sum is σ = 39234096. Its totient is φ = 8669088.

The previous prime is 21734707. The next prime is 21734711. The reversal of 21734710 is 1743712.

It is a happy number.

It is a super-3 number, since 3×21734710³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21734711) 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 7 ways as a sum of consecutive naturals, for example, 817 + ... + 6643.

It is an arithmetic number, because the mean of its divisors is an integer number (2452131).

Almost surely, 2^21734710 is an apocalyptic number.

21734710 is a deficient number, since it is larger than the sum of its proper divisors (17499386).

21734710 is a wasteful number, since it uses less digits than its factorization.

21734710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6207.

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

The square root of 21734710 is about 4662.0499782821. The cubic root of 21734710 is about 279.0730828617.

The spelling of 21734710 in words is "twenty-one million, seven hundred thirty-four thousand, seven hundred ten".