20540236742 has 8 divisors (see below), whose sum is σ = 31804237632. Its totient is φ = 9938824200.

The previous prime is 20540236741. The next prime is 20540236747. The reversal of 20540236742 is 24763204502.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20540236741) 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, 165647009 + ... + 165647132.

It is an arithmetic number, because the mean of its divisors is an integer number (3975529704).

Almost surely, 2^20540236742 is an apocalyptic number.

20540236742 is a deficient number, since it is larger than the sum of its proper divisors (11264000890).

20540236742 is a wasteful number, since it uses less digits than its factorization.

20540236742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331294174.

The product of its (nonzero) digits is 80640, while the sum is 35.

The spelling of 20540236742 in words is "twenty billion, five hundred forty million, two hundred thirty-six thousand, seven hundred forty-two".