20380587 has 8 divisors (see below), whose sum is σ = 27382080. Its totient is φ = 13483080.

The previous prime is 20380571. The next prime is 20380589. The reversal of 20380587 is 78508302.

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

It is not a de Polignac number, because 20380587 - 2⁴ = 20380571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20380589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25537 + ... + 26322.

It is an arithmetic number, because the mean of its divisors is an integer number (3422760).

Almost surely, 2^20380587 is an apocalyptic number.

20380587 is a deficient number, since it is larger than the sum of its proper divisors (7001493).

20380587 is a wasteful number, since it uses less digits than its factorization.

20380587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51993.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 20380587 is about 4514.4863495197. The cubic root of 20380587 is about 273.1527409435.

Adding to 20380587 its reverse (78508302), we get a palindrome (98888889).

The spelling of 20380587 in words is "twenty million, three hundred eighty thousand, five hundred eighty-seven".