21740334 has 32 divisors (see below), whose sum is σ = 54210816. Its totient is φ = 5646720.

The previous prime is 21740317. The next prime is 21740347. The reversal of 21740334 is 43304712.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23067 + ... + 23990.

It is an arithmetic number, because the mean of its divisors is an integer number (1694088).

Almost surely, 2^21740334 is an apocalyptic number.

21740334 is an abundant number, since it is smaller than the sum of its proper divisors (32470482).

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

21740334 is a wasteful number, since it uses less digits than its factorization.

21740334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47080.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 21740334 is about 4662.6531074057. The cubic root of 21740334 is about 279.0971514546.

The spelling of 21740334 in words is "twenty-one million, seven hundred forty thousand, three hundred thirty-four".