20487146 has 8 divisors (see below), whose sum is σ = 30836484. Its totient is φ = 10208320.

The previous prime is 20487119. The next prime is 20487157. The reversal of 20487146 is 64178402.

It can be written as a sum of positive squares in 2 ways, for example, as 19456921 + 1030225 = 4411^2 + 1015^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16895 + ... + 18066.

Almost surely, 2^20487146 is an apocalyptic number.

20487146 is a deficient number, since it is larger than the sum of its proper divisors (10349338).

20487146 is a wasteful number, since it uses less digits than its factorization.

20487146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35256.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 20487146 is about 4526.2728596495. The cubic root of 20487146 is about 273.6279693515.

The spelling of 20487146 in words is "twenty million, four hundred eighty-seven thousand, one hundred forty-six".