20607687 has 6 divisors (see below), whose sum is σ = 29766672. Its totient is φ = 13738452.

The previous prime is 20607673. The next prime is 20607709. The reversal of 20607687 is 78670602.

It is not a de Polignac number, because 20607687 - 2⁶ = 20607623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20617687) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1144863 + ... + 1144880.

It is an arithmetic number, because the mean of its divisors is an integer number (4961112).

Almost surely, 2^20607687 is an apocalyptic number.

20607687 is a deficient number, since it is larger than the sum of its proper divisors (9158985).

20607687 is a wasteful number, since it uses less digits than its factorization.

20607687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2289749 (or 2289746 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 20607687 is about 4539.5690324083. The cubic root of 20607687 is about 274.1635720352.

The spelling of 20607687 in words is "twenty million, six hundred seven thousand, six hundred eighty-seven".