20053857 has 8 divisors (see below), whose sum is σ = 26916160. Its totient is φ = 13280400.

The previous prime is 20053841. The next prime is 20053871. The reversal of 20053857 is 75835002.

It is a happy number.

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

It is not a de Polignac number, because 20053857 - 2⁴ = 20053841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20053357) 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, 21682 + ... + 22587.

It is an arithmetic number, because the mean of its divisors is an integer number (3364520).

Almost surely, 2^20053857 is an apocalyptic number.

It is an amenable number.

20053857 is a deficient number, since it is larger than the sum of its proper divisors (6862303).

20053857 is a wasteful number, since it uses less digits than its factorization.

20053857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44423.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 20053857 is about 4478.1533024228. The cubic root of 20053857 is about 271.6851939305.

Adding to 20053857 its reverse (75835002), we get a palindrome (95888859).

It can be divided in two parts, 20053 and 857, that added together give a triangular number (20910 = T₂₀₄).

The spelling of 20053857 in words is "twenty million, fifty-three thousand, eight hundred fifty-seven".