20930223 has 8 divisors (see below), whose sum is σ = 28048000. Its totient is φ = 13882968.

The previous prime is 20930209. The next prime is 20930227. The reversal of 20930223 is 32203902.

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

It is not a de Polignac number, because 20930223 - 2⁶ = 20930159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20930223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20930227) 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, 16933 + ... + 18126.

It is an arithmetic number, because the mean of its divisors is an integer number (3506000).

Almost surely, 2^20930223 is an apocalyptic number.

20930223 is a deficient number, since it is larger than the sum of its proper divisors (7117777).

20930223 is a wasteful number, since it uses less digits than its factorization.

20930223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35261.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 20930223 is about 4574.9560653628. The cubic root of 20930223 is about 275.5865080116.

The spelling of 20930223 in words is "twenty million, nine hundred thirty thousand, two hundred twenty-three".