22012372 has 6 divisors (see below), whose sum is σ = 38521658. Its totient is φ = 11006184.

The previous prime is 22012349. The next prime is 22012379. The reversal of 22012372 is 27321022.

It can be written as a sum of positive squares in only one way, i.e., 20484676 + 1527696 = 4526^2 + 1236^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2751543 + ... + 2751550.

Almost surely, 2^22012372 is an apocalyptic number.

It is an amenable number.

22012372 is a deficient number, since it is larger than the sum of its proper divisors (16509286).

22012372 is a wasteful number, since it uses less digits than its factorization.

22012372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5503097 (or 5503095 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 22012372 is about 4691.7344340872. The cubic root of 22012372 is about 280.2564487234.

Adding to 22012372 its reverse (27321022), we get a palindrome (49333394).

The spelling of 22012372 in words is "twenty-two million, twelve thousand, three hundred seventy-two".