20675487 has 16 divisors (see below), whose sum is σ = 31711232. Its totient is φ = 11737440.

The previous prime is 20675483. The next prime is 20675507. The reversal of 20675487 is 78457602.

It is not a de Polignac number, because 20675487 - 2² = 20675483 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20675483) 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, 162 + ... + 6432.

It is an arithmetic number, because the mean of its divisors is an integer number (1981952).

Almost surely, 2^20675487 is an apocalyptic number.

20675487 is a deficient number, since it is larger than the sum of its proper divisors (11035745).

20675487 is a wasteful number, since it uses less digits than its factorization.

20675487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6438.

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 20675487 is about 4547.0305695036. The cubic root of 20675487 is about 274.4639120975.

The spelling of 20675487 in words is "twenty million, six hundred seventy-five thousand, four hundred eighty-seven".