20027487 has 16 divisors (see below), whose sum is σ = 27780480. Its totient is φ = 12818400.

The previous prime is 20027461. The next prime is 20027507. The reversal of 20027487 is 78472002.

It is not a de Polignac number, because 20027487 - 2¹⁰ = 20026463 is a prime.

It is a super-2 number, since 2×20027487² = 802200471070338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20027437) 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, 17812 + ... + 18902.

It is an arithmetic number, because the mean of its divisors is an integer number (1736280).

Almost surely, 2^20027487 is an apocalyptic number.

20027487 is a deficient number, since it is larger than the sum of its proper divisors (7752993).

20027487 is a wasteful number, since it uses less digits than its factorization.

20027487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334.

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 20027487 is about 4475.2080398569. The cubic root of 20027487 is about 271.5660567303.

Adding to 20027487 its reverse (78472002), we get a palindrome (98499489).

The spelling of 20027487 in words is "twenty million, twenty-seven thousand, four hundred eighty-seven".