21734064 has 60 divisors (see below), whose sum is σ = 66359592. Its totient is φ = 6585600.

The previous prime is 21734039. The next prime is 21734077. The reversal of 21734064 is 46043712.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5277 + ... + 8444.

Almost surely, 2^21734064 is an apocalyptic number.

21734064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21734064 is an abundant number, since it is smaller than the sum of its proper divisors (44625528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21734064 is a wasteful number, since it uses less digits than its factorization.

21734064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13746 (or 13737 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 21734064 is about 4661.9806949407. The cubic root of 21734064 is about 279.0703179602.

Adding to 21734064 its reverse (46043712), we get a palindrome (67777776).

The spelling of 21734064 in words is "twenty-one million, seven hundred thirty-four thousand, sixty-four".