20483887 has 4 divisors (see below), whose sum is σ = 20983536. Its totient is φ = 19984240.

The previous prime is 20483851. The next prime is 20483893. The reversal of 20483887 is 78838402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20483887 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20483807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249763 + ... + 249844.

It is an arithmetic number, because the mean of its divisors is an integer number (5245884).

Almost surely, 2^20483887 is an apocalyptic number.

20483887 is a deficient number, since it is larger than the sum of its proper divisors (499649).

20483887 is an equidigital number, since it uses as much as digits as its factorization.

20483887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499648.

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 20483887 is about 4525.9128361028. The cubic root of 20483887 is about 273.6134594267.

The spelling of 20483887 in words is "twenty million, four hundred eighty-three thousand, eight hundred eighty-seven".