22013641 has 4 divisors (see below), whose sum is σ = 23707012. Its totient is φ = 20320272.

The previous prime is 22013617. The next prime is 22013653. The reversal of 22013641 is 14631022.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10214416 + 11799225 = 3196^2 + 3435^2 .

It is a cyclic number.

It is not a de Polignac number, because 22013641 - 2¹³ = 22005449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22013611) 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, 846666 + ... + 846691.

It is an arithmetic number, because the mean of its divisors is an integer number (5926753).

Almost surely, 2^22013641 is an apocalyptic number.

It is an amenable number.

22013641 is a deficient number, since it is larger than the sum of its proper divisors (1693371).

22013641 is a wasteful number, since it uses less digits than its factorization.

22013641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1693370.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 22013641 is about 4691.8696699717. The cubic root of 22013641 is about 280.2618341584.

Adding to 22013641 its reverse (14631022), we get a palindrome (36644663).

It can be divided in two parts, 220 and 13641, that added together give a triangular number (13861 = T₁₆₆).

The spelling of 22013641 in words is "twenty-two million, thirteen thousand, six hundred forty-one".