20053729 has 4 divisors (see below), whose sum is σ = 20128000. Its totient is φ = 19979460.

The previous prime is 20053717. The next prime is 20053763. The reversal of 20053729 is 92735002.

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, and also an emirpimes, since its reverse is a distinct semiprime: 92735002 = 2 ⋅46367501.

It is a cyclic number.

It is not a de Polignac number, because 20053729 - 2⁷ = 20053601 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20053697 and 20053706.

It is not an unprimeable number, because it can be changed into a prime (20053129) 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, 36729 + ... + 37270.

It is an arithmetic number, because the mean of its divisors is an integer number (5032000).

Almost surely, 2^20053729 is an apocalyptic number.

It is an amenable number.

20053729 is a deficient number, since it is larger than the sum of its proper divisors (74271).

20053729 is an equidigital number, since it uses as much as digits as its factorization.

20053729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74270.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 20053729 is about 4478.1390107946. The cubic root of 20053729 is about 271.6846158908.

The spelling of 20053729 in words is "twenty million, fifty-three thousand, seven hundred twenty-nine".