20487182 has 4 divisors (see below), whose sum is σ = 30730776. Its totient is φ = 10243590.

The previous prime is 20487163. The next prime is 20487211. The reversal of 20487182 is 28178402.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×20487182² = 839449252602248, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5121794 + ... + 5121797.

It is an arithmetic number, because the mean of its divisors is an integer number (7682694).

Almost surely, 2^20487182 is an apocalyptic number.

20487182 is a deficient number, since it is larger than the sum of its proper divisors (10243594).

20487182 is a wasteful number, since it uses less digits than its factorization.

20487182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10243593.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 20487182 is about 4526.2768364297. The cubic root of 20487182 is about 273.6281296244.

The spelling of 20487182 in words is "twenty million, four hundred eighty-seven thousand, one hundred eighty-two".