20069529408 has 168 divisors, whose sum is σ = 60927764352. Its totient is φ = 6547267584.

The previous prime is 20069529353. The next prime is 20069529409. The reversal of 20069529408 is 80492596002.

20069529408 is a `hidden beast` number, since 20 + 0 + 69 + 529 + 40 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20069529409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 717216 + ... + 744672.

It is an arithmetic number, because the mean of its divisors is an integer number (362665264).

Almost surely, 2^20069529408 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 20069529408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30463882176).

20069529408 is an abundant number, since it is smaller than the sum of its proper divisors (40858234944).

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

20069529408 is an equidigital number, since it uses as much as digits as its factorization.

20069529408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27531 (or 27509 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 20069529408 in words is "twenty billion, sixty-nine million, five hundred twenty-nine thousand, four hundred eight".