20042242001 has 2 divisors, whose sum is σ = 20042242002. Its totient is φ = 20042242000.

The previous prime is 20042241943. The next prime is 20042242009. The reversal of 20042242001 is 10024224002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10241440000 + 9800802001 = 101200^2 + 98999^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20042242001 is a prime.

It is not a weakly prime, because it can be changed into another prime (20042242009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10021121000 + 10021121001.

It is an arithmetic number, because the mean of its divisors is an integer number (10021121001).

Almost surely, 2^20042242001 is an apocalyptic number.

It is an amenable number.

20042242001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20042242001 is an equidigital number, since it uses as much as digits as its factorization.

20042242001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 20042242001 its reverse (10024224002), we get a palindrome (30066466003).

The spelling of 20042242001 in words is "twenty billion, forty-two million, two hundred forty-two thousand, one".