20531852810112 has 128 divisors (see below), whose sum is σ = 63600856416000. Its totient is φ = 5866243622400.

The previous prime is 20531852810083. The next prime is 20531852810137. The reversal of 20531852810112 is 21101825813502.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×20531852810112² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77810514 + ... + 78073937.

It is an arithmetic number, because the mean of its divisors is an integer number (496881690750).

Almost surely, 2^{20531852810112} is an apocalyptic number.

It is an amenable number.

20531852810112 is an abundant number, since it is smaller than the sum of its proper divisors (43069003605888).

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

20531852810112 is an equidigital number, since it uses as much as digits as its factorization.

20531852810112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155884489 (or 155884463 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 39.

The spelling of 20531852810112 in words is "twenty trillion, five hundred thirty-one billion, eight hundred fifty-two million, eight hundred ten thousand, one hundred twelve".