20057647 has 8 divisors (see below), whose sum is σ = 20800800. Its totient is φ = 19317984.

The previous prime is 20057629. The next prime is 20057659. The reversal of 20057647 is 74675002.

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

It is a cyclic number.

It is not a de Polignac number, because 20057647 - 2⁷ = 20057519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20057617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18229 + ... + 19297.

It is an arithmetic number, because the mean of its divisors is an integer number (2600100).

Almost surely, 2^20057647 is an apocalyptic number.

20057647 is a deficient number, since it is larger than the sum of its proper divisors (743153).

20057647 is a wasteful number, since it uses less digits than its factorization.

20057647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1745.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 20057647 is about 4478.5764479352. The cubic root of 20057647 is about 271.7023082114.

The spelling of 20057647 in words is "twenty million, fifty-seven thousand, six hundred forty-seven".