22451203444 has 6 divisors (see below), whose sum is σ = 39289606034. Its totient is φ = 11225601720.

The previous prime is 22451203427. The next prime is 22451203451. The reversal of 22451203444 is 44430215422.

It can be written as a sum of positive squares in only one way, i.e., 21336444900 + 1114758544 = 146070^2 + 33388^2 .

It is a super-2 number, since 2×22451203444² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2806400427 + ... + 2806400434.

Almost surely, 2^22451203444 is an apocalyptic number.

It is an amenable number.

22451203444 is a deficient number, since it is larger than the sum of its proper divisors (16838402590).

22451203444 is a wasteful number, since it uses less digits than its factorization.

22451203444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5612800865 (or 5612800863 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 31.

Adding to 22451203444 its reverse (44430215422), we get a palindrome (66881418866).

The spelling of 22451203444 in words is "twenty-two billion, four hundred fifty-one million, two hundred three thousand, four hundred forty-four".