20057957 has 4 divisors (see below), whose sum is σ = 20070540. Its totient is φ = 20045376.

The previous prime is 20057953. The next prime is 20057963. The reversal of 20057957 is 75975002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75975002 = 2 ⋅37987501.

It can be written as a sum of positive squares in 2 ways, for example, as 9728161 + 10329796 = 3119^2 + 3214^2 .

It is a cyclic number.

It is not a de Polignac number, because 20057957 - 2² = 20057953 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 (20057953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3482 + ... + 7227.

It is an arithmetic number, because the mean of its divisors is an integer number (5017635).

Almost surely, 2^20057957 is an apocalyptic number.

It is an amenable number.

20057957 is a deficient number, since it is larger than the sum of its proper divisors (12583).

20057957 is a wasteful number, since it uses less digits than its factorization.

20057957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12582.

The product of its (nonzero) digits is 22050, while the sum is 35.

The square root of 20057957 is about 4478.6110570131. The cubic root of 20057957 is about 271.7037079648.

The spelling of 20057957 in words is "twenty million, fifty-seven thousand, nine hundred fifty-seven".