20112587 has 8 divisors (see below), whose sum is σ = 21980160. Its totient is φ = 18251560.

The previous prime is 20112541. The next prime is 20112601. The reversal of 20112587 is 78521102.

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 20112587 - 2⁶ = 20112523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20112517) 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, 6638 + ... + 9180.

It is an arithmetic number, because the mean of its divisors is an integer number (2747520).

Almost surely, 2^20112587 is an apocalyptic number.

20112587 is a deficient number, since it is larger than the sum of its proper divisors (1867573).

20112587 is a wasteful number, since it uses less digits than its factorization.

20112587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3273.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 20112587 is about 4484.7058989414. The cubic root of 20112587 is about 271.9501557671.

Adding to 20112587 its reverse (78521102), we get a palindrome (98633689).

The spelling of 20112587 in words is "twenty million, one hundred twelve thousand, five hundred eighty-seven".