22021432 has 8 divisors (see below), whose sum is σ = 41290200. Its totient is φ = 11010712.

The previous prime is 22021429. The next prime is 22021457. The reversal of 22021432 is 23412022.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1376332 + ... + 1376347.

It is an arithmetic number, because the mean of its divisors is an integer number (5161275).

Almost surely, 2^22021432 is an apocalyptic number.

It is an amenable number.

22021432 is a deficient number, since it is larger than the sum of its proper divisors (19268768).

22021432 is a wasteful number, since it uses less digits than its factorization.

22021432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2752685 (or 2752681 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 22021432 is about 4692.6998625525. The cubic root of 22021432 is about 280.2948933936.

Adding to 22021432 its reverse (23412022), we get a palindrome (45433454).

The spelling of 22021432 in words is "twenty-two million, twenty-one thousand, four hundred thirty-two".