23019818 has 4 divisors (see below), whose sum is σ = 34529730. Its totient is φ = 11509908.

The previous prime is 23019817. The next prime is 23019827. The reversal of 23019818 is 81891032.

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

It can be written as a sum of positive squares in only one way, i.e., 22534009 + 485809 = 4747^2 + 697^2 .

It is not an unprimeable number, because it can be changed into a prime (23019817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5754953 + ... + 5754956.

Almost surely, 2^23019818 is an apocalyptic number.

23019818 is a deficient number, since it is larger than the sum of its proper divisors (11509912).

23019818 is a wasteful number, since it uses less digits than its factorization.

23019818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11509911.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 23019818 is about 4797.8972477534. The cubic root of 23019818 is about 284.4683553417.

The spelling of 23019818 in words is "twenty-three million, nineteen thousand, eight hundred eighteen".