20039021668536 has 128 divisors (see below), whose sum is σ = 54233848468800. Its totient is φ = 6133621063680.

The previous prime is 20039021668529. The next prime is 20039021668537. The reversal of 20039021668536 is 63586612093002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20039021668537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55295800 + ... + 55657016.

Almost surely, 2^{20039021668536} is an apocalyptic number.

20039021668536 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20039021668536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27116924234400).

20039021668536 is an abundant number, since it is smaller than the sum of its proper divisors (34194826800264).

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

20039021668536 is a wasteful number, since it uses less digits than its factorization.

20039021668536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362169 (or 362165 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 51.

The spelling of 20039021668536 in words is "twenty trillion, thirty-nine billion, twenty-one million, six hundred sixty-eight thousand, five hundred thirty-six".