20053749 has 4 divisors (see below), whose sum is σ = 26738336. Its totient is φ = 13369164.

The previous prime is 20053717. The next prime is 20053763. The reversal of 20053749 is 94735002.

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 not a de Polignac number, because 20053749 - 2⁵ = 20053717 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 (20063749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3342289 + ... + 3342294.

It is an arithmetic number, because the mean of its divisors is an integer number (6684584).

Almost surely, 2^20053749 is an apocalyptic number.

It is an amenable number.

20053749 is a deficient number, since it is larger than the sum of its proper divisors (6684587).

20053749 is an equidigital number, since it uses as much as digits as its factorization.

20053749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6684586.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 20053749 is about 4478.1412438645. The cubic root of 20053749 is about 271.6847062096.

It can be divided in two parts, 20053 and 749, that added together give a palindrome (20802).

The spelling of 20053749 in words is "twenty million, fifty-three thousand, seven hundred forty-nine".