22118402 has 4 divisors (see below), whose sum is σ = 33177606. Its totient is φ = 11059200.

The previous prime is 22118401. The next prime is 22118449. The reversal of 22118402 is 20481122.

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 only one way, i.e., 18241441 + 3876961 = 4271^2 + 1969^2 .

It is not an unprimeable number, because it can be changed into a prime (22118401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5529599 + ... + 5529602.

Almost surely, 2^22118402 is an apocalyptic number.

22118402 is a deficient number, since it is larger than the sum of its proper divisors (11059204).

22118402 is a wasteful number, since it uses less digits than its factorization.

22118402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11059203.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 22118402 is about 4703.0205187730. The cubic root of 22118402 is about 280.7057113291.

Adding to 22118402 its reverse (20481122), we get a palindrome (42599524).

The spelling of 22118402 in words is "twenty-two million, one hundred eighteen thousand, four hundred two".