22142140442 has 4 divisors (see below), whose sum is σ = 33213210666. Its totient is φ = 11071070220.

The previous prime is 22142140393. The next prime is 22142140469. The reversal of 22142140442 is 24404124122.

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., 15605256241 + 6536884201 = 124921^2 + 80851^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5535535109 + ... + 5535535112.

Almost surely, 2^22142140442 is an apocalyptic number.

22142140442 is a deficient number, since it is larger than the sum of its proper divisors (11071070224).

22142140442 is a wasteful number, since it uses less digits than its factorization.

22142140442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11071070223.

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 22142140442 its reverse (24404124122), we get a palindrome (46546264564).

The spelling of 22142140442 in words is "twenty-two billion, one hundred forty-two million, one hundred forty thousand, four hundred forty-two".