20814087 has 8 divisors (see below), whose sum is σ = 31716736. Its totient is φ = 11893752.

The previous prime is 20814077. The next prime is 20814089. The reversal of 20814087 is 78041802.

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

It is not a de Polignac number, because 20814087 - 2⁴ = 20814071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20814089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 495553 + ... + 495594.

It is an arithmetic number, because the mean of its divisors is an integer number (3964592).

Almost surely, 2^20814087 is an apocalyptic number.

20814087 is a deficient number, since it is larger than the sum of its proper divisors (10902649).

20814087 is an equidigital number, since it uses as much as digits as its factorization.

20814087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991157.

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 20814087 is about 4562.2458285366. The cubic root of 20814087 is about 275.0758446450.

Adding to 20814087 its reverse (78041802), we get a palindrome (98855889).

The spelling of 20814087 in words is "twenty million, eight hundred fourteen thousand, eighty-seven".