20187207 has 12 divisors (see below), whose sum is σ = 29247400. Its totient is φ = 13417488.

The previous prime is 20187203. The next prime is 20187227. The reversal of 20187207 is 70278102.

It is not a de Polignac number, because 20187207 - 2² = 20187203 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 (20187203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73 + ... + 6354.

Almost surely, 2^20187207 is an apocalyptic number.

20187207 is a deficient number, since it is larger than the sum of its proper divisors (9060193).

20187207 is a wasteful number, since it uses less digits than its factorization.

20187207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6782 (or 6779 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 20187207 is about 4493.0175828723. The cubic root of 20187207 is about 272.2860627602.

The spelling of 20187207 in words is "twenty million, one hundred eighty-seven thousand, two hundred seven".