20487875 has 16 divisors (see below), whose sum is σ = 25710048. Its totient is φ = 16300000.

The previous prime is 20487853. The next prime is 20487877. The reversal of 20487875 is 57878402.

It is not a de Polignac number, because 20487875 - 2⁸ = 20487619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20487877) 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 15 ways as a sum of consecutive naturals, for example, 31049 + ... + 31701.

It is an arithmetic number, because the mean of its divisors is an integer number (1606878).

Almost surely, 2^20487875 is an apocalyptic number.

20487875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20487875 is a deficient number, since it is larger than the sum of its proper divisors (5222173).

20487875 is an equidigital number, since it uses as much as digits as its factorization.

20487875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919 (or 909 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 41.

The square root of 20487875 is about 4526.3533887667. The cubic root of 20487875 is about 273.6312148405.

The spelling of 20487875 in words is "twenty million, four hundred eighty-seven thousand, eight hundred seventy-five".