20263287 has 16 divisors (see below), whose sum is σ = 29549952. Its totient is φ = 12249120.

The previous prime is 20263283. The next prime is 20263301. The reversal of 20263287 is 78236202.

It is not a de Polignac number, because 20263287 - 2² = 20263283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20263283) 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, 21888 + ... + 22794.

It is an arithmetic number, because the mean of its divisors is an integer number (1846872).

Almost surely, 2^20263287 is an apocalyptic number.

20263287 is a deficient number, since it is larger than the sum of its proper divisors (9286665).

20263287 is a wasteful number, since it uses less digits than its factorization.

20263287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 20263287 is about 4501.4760912394. The cubic root of 20263287 is about 272.6276909064.

Adding to 20263287 its reverse (78236202), we get a palindrome (98499489).

The spelling of 20263287 in words is "twenty million, two hundred sixty-three thousand, two hundred eighty-seven".