20053757 has 4 divisors (see below), whose sum is σ = 20328540. Its totient is φ = 19778976.

The previous prime is 20053717. The next prime is 20053763. The reversal of 20053757 is 75735002.

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 10106041 + 9947716 = 3179^2 + 3154^2 .

It is a cyclic number.

It is not a de Polignac number, because 20053757 - 2¹⁸ = 19791613 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 (20053717) 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, 137282 + ... + 137427.

It is an arithmetic number, because the mean of its divisors is an integer number (5082135).

Almost surely, 2^20053757 is an apocalyptic number.

It is an amenable number.

20053757 is a deficient number, since it is larger than the sum of its proper divisors (274783).

20053757 is an equidigital number, since it uses as much as digits as its factorization.

20053757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274782.

The product of its (nonzero) digits is 7350, while the sum is 29.

The square root of 20053757 is about 4478.1421370921. The cubic root of 20053757 is about 271.6847423372.

Adding to 20053757 its reverse (75735002), we get a palindrome (95788759).

The spelling of 20053757 in words is "twenty million, fifty-three thousand, seven hundred fifty-seven".