20814814742 has 4 divisors (see below), whose sum is σ = 31222222116. Its totient is φ = 10407407370.

The previous prime is 20814814711. The next prime is 20814814817. The reversal of 20814814742 is 24741841802.

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 20814814742.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5203703684 + ... + 5203703687.

It is an arithmetic number, because the mean of its divisors is an integer number (7805555529).

Almost surely, 2^20814814742 is an apocalyptic number.

20814814742 is a deficient number, since it is larger than the sum of its proper divisors (10407407374).

20814814742 is a wasteful number, since it uses less digits than its factorization.

20814814742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10407407373.

The product of its (nonzero) digits is 114688, while the sum is 41.

The spelling of 20814814742 in words is "twenty billion, eight hundred fourteen million, eight hundred fourteen thousand, seven hundred forty-two".