20288036638 has 16 divisors (see below), whose sum is σ = 32715313920. Its totient is φ = 9405651096.

The previous prime is 20288036621. The next prime is 20288036647. The reversal of 20288036638 is 83663088202.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5677956 + ... + 5681527.

It is an arithmetic number, because the mean of its divisors is an integer number (2044707120).

Almost surely, 2^20288036638 is an apocalyptic number.

20288036638 is a deficient number, since it is larger than the sum of its proper divisors (12427277282).

20288036638 is a wasteful number, since it uses less digits than its factorization.

20288036638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11359551.

The product of its (nonzero) digits is 663552, while the sum is 46.

The spelling of 20288036638 in words is "twenty billion, two hundred eighty-eight million, thirty-six thousand, six hundred thirty-eight".