20000957 has 4 divisors (see below), whose sum is σ = 20075580. Its totient is φ = 19926336.

The previous prime is 20000951. The next prime is 20000969. The reversal of 20000957 is 75900002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7284601 + 12716356 = 2699^2 + 3566^2 .

It is a cyclic number.

It is not a de Polignac number, because 20000957 - 2¹² = 19996861 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 (20000951) 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, 36908 + ... + 37445.

It is an arithmetic number, because the mean of its divisors is an integer number (5018895).

Almost surely, 2^20000957 is an apocalyptic number.

It is an amenable number.

20000957 is a deficient number, since it is larger than the sum of its proper divisors (74623).

20000957 is an equidigital number, since it uses as much as digits as its factorization.

20000957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74622.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 20000957 is about 4472.2429495724. The cubic root of 20000957 is about 271.4460910865.

Adding to 20000957 its reverse (75900002), we get a palindrome (95900959).

The spelling of 20000957 in words is "twenty million, nine hundred fifty-seven", and thus it is an aban number.