20247087 has 16 divisors (see below), whose sum is σ = 30938112. Its totient is φ = 11537760.

The previous prime is 20247079. The next prime is 20247127. The reversal of 20247087 is 78074202.

It is not a de Polignac number, because 20247087 - 2³ = 20247079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20247037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7933 + ... + 10169.

It is an arithmetic number, because the mean of its divisors is an integer number (1933632).

Almost surely, 2^20247087 is an apocalyptic number.

20247087 is a deficient number, since it is larger than the sum of its proper divisors (10691025).

20247087 is a wasteful number, since it uses less digits than its factorization.

20247087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2678.

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 20247087 is about 4499.6763216925. The cubic root of 20247087 is about 272.5550184899. Note that the first 3 decimals are identical.

The spelling of 20247087 in words is "twenty million, two hundred forty-seven thousand, eighty-seven".