22140023 has 4 divisors (see below), whose sum is σ = 22738440. Its totient is φ = 21541608.

The previous prime is 22139993. The next prime is 22140029. The reversal of 22140023 is 32004122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32004122 = 2 ⋅16002061.

It is a cyclic number.

It is not a de Polignac number, because 22140023 - 2¹⁴ = 22123639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22140029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299153 + ... + 299226.

It is an arithmetic number, because the mean of its divisors is an integer number (5684610).

Almost surely, 2^22140023 is an apocalyptic number.

22140023 is a deficient number, since it is larger than the sum of its proper divisors (598417).

22140023 is an equidigital number, since it uses as much as digits as its factorization.

22140023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598416.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 22140023 is about 4705.3185864509. The cubic root of 22140023 is about 280.7971459290.

Adding to 22140023 its reverse (32004122), we get a palindrome (54144145).

The spelling of 22140023 in words is "twenty-two million, one hundred forty thousand, twenty-three".