22738993 has 4 divisors (see below), whose sum is σ = 22778980. Its totient is φ = 22699008.

The previous prime is 22738981. The next prime is 22738999. The reversal of 22738993 is 39983722.

It is a happy number.

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 19079424 + 3659569 = 4368^2 + 1913^2 .

It is a cyclic number.

It is not a de Polignac number, because 22738993 - 2⁹ = 22738481 is a prime.

It is a super-3 number, since 3×22738993³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22738999) 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 3 ways as a sum of consecutive naturals, for example, 19128 + ... + 20281.

It is an arithmetic number, because the mean of its divisors is an integer number (5694745).

Almost surely, 2^22738993 is an apocalyptic number.

It is an amenable number.

22738993 is a deficient number, since it is larger than the sum of its proper divisors (39987).

22738993 is an equidigital number, since it uses as much as digits as its factorization.

22738993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39986.

The product of its digits is 163296, while the sum is 43.

The square root of 22738993 is about 4768.5420203664. The cubic root of 22738993 is about 283.3068504275.

The spelling of 22738993 in words is "twenty-two million, seven hundred thirty-eight thousand, nine hundred ninety-three".