20713605 has 32 divisors (see below), whose sum is σ = 36937728. Its totient is φ = 9825600.

The previous prime is 20713603. The next prime is 20713607. The reversal of 20713605 is 50631702.

It is an interprime number because it is at equal distance from previous prime (20713603) and next prime (20713607).

It is not a de Polignac number, because 20713605 - 2¹ = 20713603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20713601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6420 + ... + 9090.

It is an arithmetic number, because the mean of its divisors is an integer number (1154304).

Almost surely, 2^20713605 is an apocalyptic number.

It is an amenable number.

20713605 is a deficient number, since it is larger than the sum of its proper divisors (16224123).

20713605 is a wasteful number, since it uses less digits than its factorization.

20713605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 20713605 is about 4551.2201660654. The cubic root of 20713605 is about 274.6324787453.

The spelling of 20713605 in words is "twenty million, seven hundred thirteen thousand, six hundred five".