29521342816 has 72 divisors (see below), whose sum is σ = 67675037976. Its totient is φ = 12639674880.

The previous prime is 29521342813. The next prime is 29521342849. The reversal of 29521342816 is 61824312592.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29521342813) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1702060 + ... + 1719316.

It is an arithmetic number, because the mean of its divisors is an integer number (939931083).

Almost surely, 2^29521342816 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 29521342816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33837518988).

29521342816 is an abundant number, since it is smaller than the sum of its proper divisors (38153695160).

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

29521342816 is a wasteful number, since it uses less digits than its factorization.

29521342816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18372 (or 18357 counting only the distinct ones).

The product of its digits is 207360, while the sum is 43.

The spelling of 29521342816 in words is "twenty-nine billion, five hundred twenty-one million, three hundred forty-two thousand, eight hundred sixteen".