20355640674000 has 320 divisors, whose sum is σ = 65800800479232. Its totient is φ = 5413782528000.

The previous prime is 20355640673971. The next prime is 20355640674007. The reversal of 20355640674000 is 47604655302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20355640674007) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4001499457 + ... + 4001504543.

Almost surely, 2^{20355640674000} is an apocalyptic number.

20355640674000 is a gapful number since it is divisible by the number (20) 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 20355640674000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32900400239616).

20355640674000 is an abundant number, since it is smaller than the sum of its proper divisors (45445159805232).

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

20355640674000 is a wasteful number, since it uses less digits than its factorization.

20355640674000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6751 (or 6735 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 42.

The spelling of 20355640674000 in words is "twenty trillion, three hundred fifty-five billion, six hundred forty million, six hundred seventy-four thousand".