20957801 has 8 divisors (see below), whose sum is σ = 21349824. Its totient is φ = 20568240.

The previous prime is 20957777. The next prime is 20957819. The reversal of 20957801 is 10875902.

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 20957801 - 2¹⁰ = 20956777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20957861) 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, 27836 + ... + 28578.

It is an arithmetic number, because the mean of its divisors is an integer number (2668728).

Almost surely, 2^20957801 is an apocalyptic number.

It is an amenable number.

20957801 is a deficient number, since it is larger than the sum of its proper divisors (392023).

20957801 is an equidigital number, since it uses as much as digits as its factorization.

20957801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 20957801 is about 4577.9690912019. The cubic root of 20957801 is about 275.7074939680.

The spelling of 20957801 in words is "twenty million, nine hundred fifty-seven thousand, eight hundred one".