12020536512 has 224 divisors, whose sum is σ = 36517478400. Its totient is φ = 3875198976.

The previous prime is 12020536499. The next prime is 12020536547. The reversal of 12020536512 is 21563502021.

It is a happy number.

12020536512 is a `hidden beast` number, since 1 + 2 + 0 + 2 + 0 + 5 + 3 + 651 + 2 = 666.

It is a super-2 number, since 2×12020536512² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7227393 + ... + 7229055.

Almost surely, 2^12020536512 is an apocalyptic number.

12020536512 is a gapful number since it is divisible by the number (12) 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 12020536512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18258739200).

12020536512 is an abundant number, since it is smaller than the sum of its proper divisors (24496941888).

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

12020536512 is a wasteful number, since it uses less digits than its factorization.

12020536512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1820 (or 1804 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 12020536512 in words is "twelve billion, twenty million, five hundred thirty-six thousand, five hundred twelve".