22072423 has 4 divisors (see below), whose sum is σ = 22434328. Its totient is φ = 21710520.

The previous prime is 22072411. The next prime is 22072429. The reversal of 22072423 is 32427022.

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

It is a cyclic number.

It is not a de Polignac number, because 22072423 - 2¹⁷ = 21941351 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22072394 and 22072403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22072429) 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, 180861 + ... + 180982.

It is an arithmetic number, because the mean of its divisors is an integer number (5608582).

Almost surely, 2^22072423 is an apocalyptic number.

22072423 is a deficient number, since it is larger than the sum of its proper divisors (361905).

22072423 is an equidigital number, since it uses as much as digits as its factorization.

22072423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361904.

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 22072423 is about 4698.1297342666. The cubic root of 22072423 is about 280.5110691560.

Adding to 22072423 its reverse (32427022), we get a palindrome (54499445).

The spelling of 22072423 in words is "twenty-two million, seventy-two thousand, four hundred twenty-three".