20013323 has 4 divisors (see below), whose sum is σ = 21832728. Its totient is φ = 18193920.

The previous prime is 20013319. The next prime is 20013347. The reversal of 20013323 is 32331002.

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 20013323 - 2² = 20013319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20013298 and 20013307.

It is not an unprimeable number, because it can be changed into a prime (20013313) 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, 909686 + ... + 909707.

It is an arithmetic number, because the mean of its divisors is an integer number (5458182).

Almost surely, 2^20013323 is an apocalyptic number.

20013323 is a deficient number, since it is larger than the sum of its proper divisors (1819405).

20013323 is a wasteful number, since it uses less digits than its factorization.

20013323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819404.

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

The square root of 20013323 is about 4473.6252636983. The cubic root of 20013323 is about 271.5020219239.

Adding to 20013323 its reverse (32331002), we get a palindrome (52344325).

The spelling of 20013323 in words is "twenty million, thirteen thousand, three hundred twenty-three".