20316505142 has 4 divisors (see below), whose sum is σ = 30474757716. Its totient is φ = 10158252570.

The previous prime is 20316505103. The next prime is 20316505159. The reversal of 20316505142 is 24150561302.

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

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, 5079126284 + ... + 5079126287.

It is an arithmetic number, because the mean of its divisors is an integer number (7618689429).

Almost surely, 2^20316505142 is an apocalyptic number.

20316505142 is a deficient number, since it is larger than the sum of its proper divisors (10158252574).

20316505142 is a wasteful number, since it uses less digits than its factorization.

20316505142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10158252573.

The product of its (nonzero) digits is 7200, while the sum is 29.

The spelling of 20316505142 in words is "twenty billion, three hundred sixteen million, five hundred five thousand, one hundred forty-two".