20734605 has 24 divisors (see below), whose sum is σ = 37833120. Its totient is φ = 10476000.

The previous prime is 20734589. The next prime is 20734613. The reversal of 20734605 is 50643702.

It is a happy number.

20734605 is a `hidden beast` number, since 20 + 7 + 34 + 605 = 666.

It is not a de Polignac number, because 20734605 - 2⁴ = 20734589 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11271 + ... + 12980.

It is an arithmetic number, because the mean of its divisors is an integer number (1576380).

Almost surely, 2^20734605 is an apocalyptic number.

It is an amenable number.

20734605 is a deficient number, since it is larger than the sum of its proper divisors (17098515).

20734605 is a wasteful number, since it uses less digits than its factorization.

20734605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24281 (or 24278 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 20734605 is about 4553.5266552421. The cubic root of 20734605 is about 274.7252572862.

The spelling of 20734605 in words is "twenty million, seven hundred thirty-four thousand, six hundred five".