20587485 has 16 divisors (see below), whose sum is σ = 33111936. Its totient is φ = 10922688.

The previous prime is 20587451. The next prime is 20587487. The reversal of 20587485 is 58478502.

It is not a de Polignac number, because 20587485 - 2⁶ = 20587421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20587487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 529 + ... + 6438.

It is an arithmetic number, because the mean of its divisors is an integer number (2069496).

Almost surely, 2^20587485 is an apocalyptic number.

It is an amenable number.

20587485 is a deficient number, since it is larger than the sum of its proper divisors (12524451).

20587485 is a wasteful number, since it uses less digits than its factorization.

20587485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7172.

The product of its (nonzero) digits is 89600, while the sum is 39.

The square root of 20587485 is about 4537.3433857269. The cubic root of 20587485 is about 274.0739539663.

The spelling of 20587485 in words is "twenty million, five hundred eighty-seven thousand, four hundred eighty-five".