20023331 has 4 divisors (see below), whose sum is σ = 21201192. Its totient is φ = 18845472.

The previous prime is 20023313. The next prime is 20023343. The reversal of 20023331 is 13332002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13332002 = 2 ⋅6666001.

It is a cyclic number.

It is not a de Polignac number, because 20023331 - 2¹⁸ = 19761187 is a prime.

It is a super-2 number, since 2×20023331² = 801867568671122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20023391) 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, 588905 + ... + 588938.

It is an arithmetic number, because the mean of its divisors is an integer number (5300298).

Almost surely, 2^20023331 is an apocalyptic number.

20023331 is a deficient number, since it is larger than the sum of its proper divisors (1177861).

20023331 is a wasteful number, since it uses less digits than its factorization.

20023331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177860.

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 20023331 is about 4474.7436798101. The cubic root of 20023331 is about 271.5472707719.

Adding to 20023331 its reverse (13332002), we get a palindrome (33355333).

The spelling of 20023331 in words is "twenty million, twenty-three thousand, three hundred thirty-one".