20221142442 has 16 divisors (see below), whose sum is σ = 40859216832. Its totient is φ = 6670892160.

The previous prime is 20221142401. The next prime is 20221142443. The reversal of 20221142442 is 24424112202.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20221142443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17371534 + ... + 17372697.

It is an arithmetic number, because the mean of its divisors is an integer number (2553701052).

Almost surely, 2^20221142442 is an apocalyptic number.

20221142442 is an abundant number, since it is smaller than the sum of its proper divisors (20638074390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20221142442 is a wasteful number, since it uses less digits than its factorization.

20221142442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34744333.

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 20221142442 its reverse (24424112202), we get a palindrome (44645254644).

The spelling of 20221142442 in words is "twenty billion, two hundred twenty-one million, one hundred forty-two thousand, four hundred forty-two".