20223505 has 16 divisors (see below), whose sum is σ = 25701120. Its totient is φ = 15234048.

The previous prime is 20223499. The next prime is 20223517. The reversal of 20223505 is 50532202.

It is not a de Polignac number, because 20223505 - 2⁵ = 20223473 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17784 + ... + 18886.

It is an arithmetic number, because the mean of its divisors is an integer number (1606320).

Almost surely, 2^20223505 is an apocalyptic number.

It is an amenable number.

20223505 is a deficient number, since it is larger than the sum of its proper divisors (5477615).

20223505 is a wasteful number, since it uses less digits than its factorization.

20223505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320.

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 20223505 is about 4497.0551475382. The cubic root of 20223505 is about 272.4491614612.

Adding to 20223505 its reverse (50532202), we get a palindrome (70755707).

The spelling of 20223505 in words is "twenty million, two hundred twenty-three thousand, five hundred five".