20361233 has 16 divisors (see below), whose sum is σ = 21979776. Its totient is φ = 18817920.

The previous prime is 20361221. The next prime is 20361239. The reversal of 20361233 is 33216302.

It is a cyclic number.

It is not a de Polignac number, because 20361233 - 2¹⁸ = 20099089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20361239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112403 + ... + 112583.

It is an arithmetic number, because the mean of its divisors is an integer number (1373736).

Almost surely, 2^20361233 is an apocalyptic number.

20361233 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20361233 is a deficient number, since it is larger than the sum of its proper divisors (1618543).

20361233 is a wasteful number, since it uses less digits than its factorization.

20361233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 20361233 is about 4512.3422964132. The cubic root of 20361233 is about 273.0662489554.

Adding to 20361233 its reverse (33216302), we get a palindrome (53577535).

The spelling of 20361233 in words is "twenty million, three hundred sixty-one thousand, two hundred thirty-three".