20669053 has 4 divisors (see below), whose sum is σ = 20820060. Its totient is φ = 20518048.

The previous prime is 20669041. The next prime is 20669063. The reversal of 20669053 is 35096602.

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 6365529 + 14303524 = 2523^2 + 3782^2 .

It is a cyclic number.

It is not a de Polignac number, because 20669053 - 2⁹ = 20668541 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 (20669063) 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, 75298 + ... + 75571.

It is an arithmetic number, because the mean of its divisors is an integer number (5205015).

Almost surely, 2^20669053 is an apocalyptic number.

It is an amenable number.

20669053 is a deficient number, since it is larger than the sum of its proper divisors (151007).

20669053 is a wasteful number, since it uses less digits than its factorization.

20669053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151006.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 20669053 is about 4546.3230197600. The cubic root of 20669053 is about 274.4354390234.

The spelling of 20669053 in words is "twenty million, six hundred sixty-nine thousand, fifty-three".