23218045 has 8 divisors (see below), whose sum is σ = 27914040. Its totient is φ = 18539520.

The previous prime is 23218043. The next prime is 23218049. The reversal of 23218045 is 54081232.

It can be written as a sum of positive squares in 4 ways, for example, as 120409 + 23097636 = 347^2 + 4806^2 .

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

It is not a de Polignac number, because 23218045 - 2¹ = 23218043 is a prime.

It is a super-2 number, since 2×23218045² = 1078155227244050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23218043) 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, 1236 + ... + 6925.

It is an arithmetic number, because the mean of its divisors is an integer number (3489255).

Almost surely, 2^23218045 is an apocalyptic number.

It is an amenable number.

23218045 is a deficient number, since it is larger than the sum of its proper divisors (4695995).

23218045 is an equidigital number, since it uses as much as digits as its factorization.

23218045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8735.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 23218045 is about 4818.5106620200. The cubic root of 23218045 is about 285.2825555197.

Adding to 23218045 its reverse (54081232), we get a palindrome (77299277).

The spelling of 23218045 in words is "twenty-three million, two hundred eighteen thousand, forty-five".