20287698 has 16 divisors (see below), whose sum is σ = 42962400. Its totient is φ = 6364736.

The previous prime is 20287637. The next prime is 20287703. The reversal of 20287698 is 89678202.

It is a happy number.

20287698 is nontrivially palindromic in base 12.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99348 + ... + 99551.

It is an arithmetic number, because the mean of its divisors is an integer number (2685150).

Almost surely, 2^20287698 is an apocalyptic number.

20287698 is an abundant number, since it is smaller than the sum of its proper divisors (22674702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20287698 is a wasteful number, since it uses less digits than its factorization.

20287698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198921.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 20287698 is about 4504.1867190426. The cubic root of 20287698 is about 272.7371243512.

The spelling of 20287698 in words is "twenty million, two hundred eighty-seven thousand, six hundred ninety-eight".