20187268 has 6 divisors (see below), whose sum is σ = 35327726. Its totient is φ = 10093632.

The previous prime is 20187259. The next prime is 20187269. The reversal of 20187268 is 86278102.

It can be written as a sum of positive squares in only one way, i.e., 19642624 + 544644 = 4432^2 + 738^2 .

It is not an unprimeable number, because it can be changed into a prime (20187269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2523405 + ... + 2523412.

Almost surely, 2^20187268 is an apocalyptic number.

It is an amenable number.

20187268 is a deficient number, since it is larger than the sum of its proper divisors (15140458).

20187268 is a wasteful number, since it uses less digits than its factorization.

20187268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5046821 (or 5046819 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 20187268 is about 4493.0243711781. The cubic root of 20187268 is about 272.2863370170.

The spelling of 20187268 in words is "twenty million, one hundred eighty-seven thousand, two hundred sixty-eight".