22364021 has 4 divisors (see below), whose sum is σ = 22968492. Its totient is φ = 21759552.

The previous prime is 22363967. The next prime is 22364053. The reversal of 22364021 is 12046322.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12046322 = 2 ⋅6023161.

It can be written as a sum of positive squares in 2 ways, for example, as 15100996 + 7263025 = 3886^2 + 2695^2 .

It is not a de Polignac number, because 22364021 - 2²² = 18169717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22363984 and 22364002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22364521) 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, 302180 + ... + 302253.

It is an arithmetic number, because the mean of its divisors is an integer number (5742123).

Almost surely, 2^22364021 is an apocalyptic number.

It is an amenable number.

22364021 is a deficient number, since it is larger than the sum of its proper divisors (604471).

22364021 is an equidigital number, since it uses as much as digits as its factorization.

22364021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604470.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 22364021 is about 4729.0613233495. The cubic root of 22364021 is about 281.7409429516.

The spelling of 22364021 in words is "twenty-two million, three hundred sixty-four thousand, twenty-one".