22404142 has 4 divisors (see below), whose sum is σ = 33606216. Its totient is φ = 11202070.

The previous prime is 22404131. The next prime is 22404143. The reversal of 22404142 is 24140422.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22404143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5601034 + ... + 5601037.

It is an arithmetic number, because the mean of its divisors is an integer number (8401554).

Almost surely, 2^22404142 is an apocalyptic number.

22404142 is a deficient number, since it is larger than the sum of its proper divisors (11202074).

22404142 is a wasteful number, since it uses less digits than its factorization.

22404142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11202073.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 22404142 is about 4733.3013848687. The cubic root of 22404142 is about 281.9093231590.

Adding to 22404142 its reverse (24140422), we get a palindrome (46544564).

The spelling of 22404142 in words is "twenty-two million, four hundred four thousand, one hundred forty-two".