20500163642 has 8 divisors (see below), whose sum is σ = 35143137696. Its totient is φ = 8785784412.

The previous prime is 20500163641. The next prime is 20500163653. The reversal of 20500163642 is 24636100502.

20500163642 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (20500163641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 732148688 + ... + 732148715.

It is an arithmetic number, because the mean of its divisors is an integer number (4392892212).

Almost surely, 2^20500163642 is an apocalyptic number.

20500163642 is a deficient number, since it is larger than the sum of its proper divisors (14642974054).

20500163642 is a wasteful number, since it uses less digits than its factorization.

20500163642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464297412.

The product of its (nonzero) digits is 8640, while the sum is 29.

The spelling of 20500163642 in words is "twenty billion, five hundred million, one hundred sixty-three thousand, six hundred forty-two".