20487410 has 16 divisors (see below), whose sum is σ = 37034712. Its totient is φ = 8160000.

The previous prime is 20487407. The next prime is 20487433. The reversal of 20487410 is 1478402.

It can be written as a sum of positive squares in 4 ways, for example, as 14371681 + 6115729 = 3791^2 + 2473^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20487410.

It is an unprimeable number.

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, 1841 + ... + 6660.

Almost surely, 2^20487410 is an apocalyptic number.

20487410 is a deficient number, since it is larger than the sum of its proper divisors (16547302).

20487410 is a wasteful number, since it uses less digits than its factorization.

20487410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8749.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 20487410 is about 4526.3020226229. The cubic root of 20487410 is about 273.6291446815.

The spelling of 20487410 in words is "twenty million, four hundred eighty-seven thousand, four hundred ten".