20345329512 has 384 divisors, whose sum is σ = 61838899200. Its totient is φ = 6021734400.

The previous prime is 20345329483. The next prime is 20345329519. The reversal of 20345329512 is 21592354302.

20345329512 is a `hidden beast` number, since 2 + 0 + 34 + 532 + 95 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20345329519) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 228599164 + ... + 228599252.

It is an arithmetic number, because the mean of its divisors is an integer number (161038800).

Almost surely, 2^20345329512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20345329512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30919449600).

20345329512 is an abundant number, since it is smaller than the sum of its proper divisors (41493569688).

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

20345329512 is a wasteful number, since it uses less digits than its factorization.

20345329512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289 (or 282 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The spelling of 20345329512 in words is "twenty billion, three hundred forty-five million, three hundred twenty-nine thousand, five hundred twelve".