21422074 has 24 divisors (see below), whose sum is σ = 34800948. Its totient is φ = 9855360.

The previous prime is 21422053. The next prime is 21422077. The reversal of 21422074 is 47022412.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20638849 + 783225 = 4543^2 + 885^2 .

It is a super-2 number, since 2×21422074² = 917810508922952, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21422077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118264 + ... + 118444.

Almost surely, 2^21422074 is an apocalyptic number.

21422074 is a deficient number, since it is larger than the sum of its proper divisors (13378874).

21422074 is a wasteful number, since it uses less digits than its factorization.

21422074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318 (or 259 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 21422074 is about 4628.3986431594. The cubic root of 21422074 is about 277.7285361366.

Adding to 21422074 its reverse (47022412), we get a palindrome (68444486).

The spelling of 21422074 in words is "twenty-one million, four hundred twenty-two thousand, seventy-four".