20442240042 has 32 divisors (see below), whose sum is σ = 46863802752. Its totient is φ = 5823304704.

The previous prime is 20442240017. The next prime is 20442240089. The reversal of 20442240042 is 24004224402.

It is a junction number, because it is equal to n+sod(n) for n = 20442239994 and 20442240021.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 707983 + ... + 736290.

It is an arithmetic number, because the mean of its divisors is an integer number (1464493836).

Almost surely, 2^20442240042 is an apocalyptic number.

20442240042 is an abundant number, since it is smaller than the sum of its proper divisors (26421562710).

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

20442240042 is a wasteful number, since it uses less digits than its factorization.

20442240042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444622.

The product of its (nonzero) digits is 4096, while the sum is 24.

Adding to 20442240042 its reverse (24004224402), we get a palindrome (44446464444).

The spelling of 20442240042 in words is "twenty billion, four hundred forty-two million, two hundred forty thousand, forty-two".