20746605 has 16 divisors (see below), whose sum is σ = 36212544. Its totient is φ = 10058880.

The previous prime is 20746591. The next prime is 20746619. The reversal of 20746605 is 50664702.

It is an interprime number because it is at equal distance from previous prime (20746591) and next prime (20746619).

It is not a de Polignac number, because 20746605 - 2⁴ = 20746589 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 62704 + ... + 63033.

It is an arithmetic number, because the mean of its divisors is an integer number (2263284).

Almost surely, 2^20746605 is an apocalyptic number.

It is an amenable number.

20746605 is a deficient number, since it is larger than the sum of its proper divisors (15465939).

20746605 is a wasteful number, since it uses less digits than its factorization.

20746605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125756.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 20746605 is about 4554.8441246655. The cubic root of 20746605 is about 274.7782454721.

The spelling of 20746605 in words is "twenty million, seven hundred forty-six thousand, six hundred five".