20553573 has 8 divisors (see below), whose sum is σ = 28847200. Its totient is φ = 12981168.

The previous prime is 20553569. The next prime is 20553581. The reversal of 20553573 is 37535502.

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

It is not a de Polignac number, because 20553573 - 2² = 20553569 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20553573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20553503) 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, 180238 + ... + 180351.

It is an arithmetic number, because the mean of its divisors is an integer number (3605900).

Almost surely, 2^20553573 is an apocalyptic number.

It is an amenable number.

20553573 is a deficient number, since it is larger than the sum of its proper divisors (8293627).

20553573 is a wasteful number, since it uses less digits than its factorization.

20553573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360611.

The product of its (nonzero) digits is 15750, while the sum is 30.

The square root of 20553573 is about 4533.6048570646. The cubic root of 20553573 is about 273.9233850828.

The spelling of 20553573 in words is "twenty million, five hundred fifty-three thousand, five hundred seventy-three".