20134122742 has 4 divisors (see below), whose sum is σ = 30201184116. Its totient is φ = 10067061370.

The previous prime is 20134122739. The next prime is 20134122779. The reversal of 20134122742 is 24722143102.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20134122742.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5033530684 + ... + 5033530687.

It is an arithmetic number, because the mean of its divisors is an integer number (7550296029).

Almost surely, 2^20134122742 is an apocalyptic number.

20134122742 is a deficient number, since it is larger than the sum of its proper divisors (10067061374).

20134122742 is a wasteful number, since it uses less digits than its factorization.

20134122742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10067061373.

The product of its (nonzero) digits is 5376, while the sum is 28.

Adding to 20134122742 its reverse (24722143102), we get a palindrome (44856265844).

The spelling of 20134122742 in words is "twenty billion, one hundred thirty-four million, one hundred twenty-two thousand, seven hundred forty-two".