20023653 has 8 divisors (see below), whose sum is σ = 28751968. Its totient is φ = 12322224.

The previous prime is 20023651. The next prime is 20023693. The reversal of 20023653 is 35632002.

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

It is not a de Polignac number, because 20023653 - 2¹ = 20023651 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 (20023651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256675 + ... + 256752.

It is an arithmetic number, because the mean of its divisors is an integer number (3593996).

Almost surely, 2^20023653 is an apocalyptic number.

It is an amenable number.

20023653 is a deficient number, since it is larger than the sum of its proper divisors (8728315).

20023653 is a wasteful number, since it uses less digits than its factorization.

20023653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513443.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 20023653 is about 4474.7796593799. The cubic root of 20023653 is about 271.5487263698.

Adding to 20023653 its reverse (35632002), we get a palindrome (55655655).

The spelling of 20023653 in words is "twenty million, twenty-three thousand, six hundred fifty-three".