23021440238 has 4 divisors (see below), whose sum is σ = 34532160360. Its totient is φ = 11510720118.

The previous prime is 23021440237. The next prime is 23021440331. The reversal of 23021440238 is 83204412032.

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

It is a self number, because there is not a number n which added to its sum of digits gives 23021440238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23021440237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5755360058 + ... + 5755360061.

It is an arithmetic number, because the mean of its divisors is an integer number (8633040090).

Almost surely, 2^23021440238 is an apocalyptic number.

23021440238 is a deficient number, since it is larger than the sum of its proper divisors (11510720122).

23021440238 is a wasteful number, since it uses less digits than its factorization.

23021440238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11510720121.

The product of its (nonzero) digits is 9216, while the sum is 29.

The spelling of 23021440238 in words is "twenty-three billion, twenty-one million, four hundred forty thousand, two hundred thirty-eight".