20750957 has 4 divisors (see below), whose sum is σ = 21043296. Its totient is φ = 20458620.

The previous prime is 20750953. The next prime is 20750959. The reversal of 20750957 is 75905702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20750957 - 2² = 20750953 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 (20750953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146063 + ... + 146204.

It is an arithmetic number, because the mean of its divisors is an integer number (5260824).

Almost surely, 2^20750957 is an apocalyptic number.

It is an amenable number.

20750957 is a deficient number, since it is larger than the sum of its proper divisors (292339).

20750957 is an equidigital number, since it uses as much as digits as its factorization.

20750957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292338.

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

The square root of 20750957 is about 4555.3218327578. The cubic root of 20750957 is about 274.7974574719.

The spelling of 20750957 in words is "twenty million, seven hundred fifty thousand, nine hundred fifty-seven".