22021023 has 8 divisors (see below), whose sum is σ = 29915568. Its totient is φ = 14403584.

The previous prime is 22021009. The next prime is 22021049. The reversal of 22021023 is 32012022.

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

It is a cyclic number.

It is not a de Polignac number, because 22021023 - 2⁴ = 22021007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69090 + ... + 69407.

It is an arithmetic number, because the mean of its divisors is an integer number (3739446).

Almost surely, 2^22021023 is an apocalyptic number.

22021023 is a deficient number, since it is larger than the sum of its proper divisors (7894545).

22021023 is a wasteful number, since it uses less digits than its factorization.

22021023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138553.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 22021023 is about 4692.6562840251. The cubic root of 22021023 is about 280.2931580944.

Adding to 22021023 its reverse (32012022), we get a palindrome (54033045).

Subtracting 22021023 from its reverse (32012022), we obtain a palindrome (9990999).

The spelling of 22021023 in words is "twenty-two million, twenty-one thousand, twenty-three".