20213718453852 has 288 divisors, whose sum is σ = 60323679112704. Its totient is φ = 5155583178240.

The previous prime is 20213718453839. The next prime is 20213718453883. The reversal of 20213718453852 is 25835481731202.

It is a junction number, because it is equal to n+sod(n) for n = 20213718453795 and 20213718453804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 215826378 + ... + 215920014.

Almost surely, 2^{20213718453852} is an apocalyptic number.

20213718453852 is a gapful number since it is divisible by the number (22) 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 20213718453852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30161839556352).

20213718453852 is an abundant number, since it is smaller than the sum of its proper divisors (40109960658852).

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

20213718453852 is a wasteful number, since it uses less digits than its factorization.

20213718453852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94057 (or 94044 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 51.

The spelling of 20213718453852 in words is "twenty trillion, two hundred thirteen billion, seven hundred eighteen million, four hundred fifty-three thousand, eight hundred fifty-two".