22220723 has 8 divisors (see below), whose sum is σ = 25986048. Its totient is φ = 18603144.

The previous prime is 22220713. The next prime is 22220741. The reversal of 22220723 is 32702222.

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

It is not a de Polignac number, because 22220723 - 2¹⁸ = 21958579 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22220695 and 22220704.

It is not an unprimeable number, because it can be changed into a prime (22220713) 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, 36611 + ... + 37212.

It is an arithmetic number, because the mean of its divisors is an integer number (3248256).

Almost surely, 2^22220723 is an apocalyptic number.

22220723 is a deficient number, since it is larger than the sum of its proper divisors (3765325).

22220723 is an equidigital number, since it uses as much as digits as its factorization.

22220723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73873.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 22220723 is about 4713.8861886982. The cubic root of 22220723 is about 281.1378991601.

Adding to 22220723 its reverse (32702222), we get a palindrome (54922945).

The spelling of 22220723 in words is "twenty-two million, two hundred twenty thousand, seven hundred twenty-three".