20703607 has 4 divisors (see below), whose sum is σ = 20725776. Its totient is φ = 20681440.

The previous prime is 20703601. The next prime is 20703619. The reversal of 20703607 is 70630702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70630702 = 2 ⋅35315351.

It is a cyclic number.

It is not a de Polignac number, because 20703607 - 2⁷ = 20703479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20703601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9619 + ... + 11572.

It is an arithmetic number, because the mean of its divisors is an integer number (5181444).

Almost surely, 2^20703607 is an apocalyptic number.

20703607 is a deficient number, since it is larger than the sum of its proper divisors (22169).

20703607 is an equidigital number, since it uses as much as digits as its factorization.

20703607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22168.

The product of its (nonzero) digits is 1764, while the sum is 25.

The square root of 20703607 is about 4550.1216467255. The cubic root of 20703607 is about 274.5882852886.

The spelling of 20703607 in words is "twenty million, seven hundred three thousand, six hundred seven".