20420134242 has 8 divisors (see below), whose sum is σ = 40840268496. Its totient is φ = 6806711412.

The previous prime is 20420134181. The next prime is 20420134243. The reversal of 20420134242 is 24243102402.

It is a sphenic number, since it is the product of 3 distinct primes.

20420134242 is an admirable number.

It is a super-2 number, since 2×20420134242² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20420134243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1701677848 + ... + 1701677859.

It is an arithmetic number, because the mean of its divisors is an integer number (5105033562).

Almost surely, 2^20420134242 is an apocalyptic number.

20420134242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20420134242 is a wasteful number, since it uses less digits than its factorization.

20420134242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3403355712.

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 20420134242 its reverse (24243102402), we get a palindrome (44663236644).

The spelling of 20420134242 in words is "twenty billion, four hundred twenty million, one hundred thirty-four thousand, two hundred forty-two".