20233645 has 8 divisors (see below), whose sum is σ = 24388704. Its totient is φ = 16114704.

The previous prime is 20233643. The next prime is 20233649. The reversal of 20233645 is 54633202.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20233645 - 2¹ = 20233643 is a prime.

It is a super-3 number, since 3×20233645³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20233643) 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, 7779 + ... + 10048.

It is an arithmetic number, because the mean of its divisors is an integer number (3048588).

Almost surely, 2^20233645 is an apocalyptic number.

It is an amenable number.

20233645 is a deficient number, since it is larger than the sum of its proper divisors (4155059).

20233645 is a wasteful number, since it uses less digits than its factorization.

20233645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18059.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 20233645 is about 4498.1824107077. The cubic root of 20233645 is about 272.4946888957.

Adding to 20233645 its reverse (54633202), we get a palindrome (74866847).

The spelling of 20233645 in words is "twenty million, two hundred thirty-three thousand, six hundred forty-five".