22001023 has 4 divisors (see below), whose sum is σ = 24001128. Its totient is φ = 20000920.

The previous prime is 22000963. The next prime is 22001033. The reversal of 22001023 is 32010022.

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 22001023 - 2¹⁷ = 21869951 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 (22001033) 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, 1000036 + ... + 1000057.

It is an arithmetic number, because the mean of its divisors is an integer number (6000282).

Almost surely, 2^22001023 is an apocalyptic number.

22001023 is a deficient number, since it is larger than the sum of its proper divisors (2000105).

22001023 is a wasteful number, since it uses less digits than its factorization.

22001023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000104.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 22001023 is about 4690.5248107221. The cubic root of 22001023 is about 280.2082761592.

Adding to 22001023 its reverse (32010022), we get a palindrome (54011045).

It can be divided in two parts, 2200 and 1023, that added together give a palindrome (3223).

The spelling of 22001023 in words is "twenty-two million, one thousand, twenty-three".