22421738 has 4 divisors (see below), whose sum is σ = 33632610. Its totient is φ = 11210868.

The previous prime is 22421699. The next prime is 22421747. The reversal of 22421738 is 83712422.

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

It can be written as a sum of positive squares in only one way, i.e., 22401289 + 20449 = 4733^2 + 143^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22421738.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605433 + ... + 5605436.

Almost surely, 2^22421738 is an apocalyptic number.

22421738 is a deficient number, since it is larger than the sum of its proper divisors (11210872).

22421738 is a wasteful number, since it uses less digits than its factorization.

22421738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11210871.

The product of its digits is 5376, while the sum is 29.

The square root of 22421738 is about 4735.1597649921. The cubic root of 22421738 is about 281.9831068129.

The spelling of 22421738 in words is "twenty-two million, four hundred twenty-one thousand, seven hundred thirty-eight".