20338388536 has 32 divisors (see below), whose sum is σ = 38221048800. Its totient is φ = 10146142720.

The previous prime is 20338388533. The next prime is 20338388563. The reversal of 20338388536 is 63588383302.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20338388536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20338388533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10630716 + ... + 10632628.

It is an arithmetic number, because the mean of its divisors is an integer number (1194407775).

Almost surely, 2^20338388536 is an apocalyptic number.

It is an amenable number.

20338388536 is a deficient number, since it is larger than the sum of its proper divisors (17882660264).

20338388536 is a wasteful number, since it uses less digits than its factorization.

20338388536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4239 (or 4235 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 49.

The spelling of 20338388536 in words is "twenty billion, three hundred thirty-eight million, three hundred eighty-eight thousand, five hundred thirty-six".