20535039536 has 80 divisors (see below), whose sum is σ = 43764627456. Its totient is φ = 9256800000.

The previous prime is 20535039533. The next prime is 20535039541. The reversal of 20535039536 is 63593053502.

It is a junction number, because it is equal to n+sod(n) for n = 20535039493 and 20535039502.

It is not an unprimeable number, because it can be changed into a prime (20535039533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14151611 + ... + 14153061.

Almost surely, 2^20535039536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20535039536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21882313728).

20535039536 is an abundant number, since it is smaller than the sum of its proper divisors (23229587920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20535039536 is a wasteful number, since it uses less digits than its factorization.

20535039536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2082 (or 2076 counting only the distinct ones).

The product of its (nonzero) digits is 364500, while the sum is 41.

The spelling of 20535039536 in words is "twenty billion, five hundred thirty-five million, thirty-nine thousand, five hundred thirty-six".