20287893 has 8 divisors (see below), whose sum is σ = 27122688. Its totient is φ = 13489184.

The previous prime is 20287889. The next prime is 20287901. The reversal of 20287893 is 39878202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20287893 - 2² = 20287889 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20287823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7680 + ... + 9977.

It is an arithmetic number, because the mean of its divisors is an integer number (3390336).

Almost surely, 2^20287893 is an apocalyptic number.

It is an amenable number.

20287893 is a deficient number, since it is larger than the sum of its proper divisors (6834795).

20287893 is a wasteful number, since it uses less digits than its factorization.

20287893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18043.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 20287893 is about 4504.2083655177. The cubic root of 20287893 is about 272.7379981742.

The spelling of 20287893 in words is "twenty million, two hundred eighty-seven thousand, eight hundred ninety-three".