22260821 has 16 divisors (see below), whose sum is σ = 25363968. Its totient is φ = 19353600.

The previous prime is 22260811. The next prime is 22260853. The reversal of 22260821 is 12806222.

It is a cyclic number.

It is not a de Polignac number, because 22260821 - 2¹⁸ = 21998677 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 (22260811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32741 + ... + 33413.

It is an arithmetic number, because the mean of its divisors is an integer number (1585248).

Almost surely, 2^22260821 is an apocalyptic number.

It is an amenable number.

22260821 is a deficient number, since it is larger than the sum of its proper divisors (3103147).

22260821 is a wasteful number, since it uses less digits than its factorization.

22260821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 22260821 is about 4718.1374503081. The cubic root of 22260821 is about 281.3069049631.

The spelling of 22260821 in words is "twenty-two million, two hundred sixty thousand, eight hundred twenty-one".