20420022420242 has 32 divisors (see below), whose sum is σ = 34140511514880. Its totient is φ = 9103190088960.

The previous prime is 20420022420241. The next prime is 20420022420257. The reversal of 20420022420242 is 24202422002402.

It is not an unprimeable number, because it can be changed into a prime (20420022420241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11766548 + ... + 13389984.

It is an arithmetic number, because the mean of its divisors is an integer number (1066890984840).

Almost surely, 2^{20420022420242} is an apocalyptic number.

20420022420242 is a deficient number, since it is larger than the sum of its proper divisors (13720489094638).

20420022420242 is a wasteful number, since it uses less digits than its factorization.

20420022420242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642946.

The product of its (nonzero) digits is 8192, while the sum is 26.

Adding to 20420022420242 its reverse (24202422002402), we get a palindrome (44622444422644).

The spelling of 20420022420242 in words is "twenty trillion, four hundred twenty billion, twenty-two million, four hundred twenty thousand, two hundred forty-two".