20031323 has 4 divisors (see below), whose sum is σ = 21572208. Its totient is φ = 18490440.

The previous prime is 20031313. The next prime is 20031331. The reversal of 20031323 is 32313002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20031323 - 2¹⁰ = 20030299 is a prime.

It is a super-2 number, since 2×20031323² = 802507802260658, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20031298 and 20031307.

It is not an unprimeable number, because it can be changed into a prime (20031313) 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, 770423 + ... + 770448.

It is an arithmetic number, because the mean of its divisors is an integer number (5393052).

Almost surely, 2^20031323 is an apocalyptic number.

20031323 is a deficient number, since it is larger than the sum of its proper divisors (1540885).

20031323 is a wasteful number, since it uses less digits than its factorization.

20031323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540884.

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

The square root of 20031323 is about 4475.6366027639. The cubic root of 20031323 is about 271.5833939178.

Adding to 20031323 its reverse (32313002), we get a palindrome (52344325).

The spelling of 20031323 in words is "twenty million, thirty-one thousand, three hundred twenty-three".