29031430818 has 64 divisors (see below), whose sum is σ = 63172327680. Its totient is φ = 8841063168.

The previous prime is 29031430811. The next prime is 29031430843. The reversal of 29031430818 is 81803413092.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (29031430811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13117480 + ... + 13119692.

It is an arithmetic number, because the mean of its divisors is an integer number (987067620).

Almost surely, 2^29031430818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29031430818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31586163840).

29031430818 is an abundant number, since it is smaller than the sum of its proper divisors (34140896862).

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

29031430818 is a wasteful number, since it uses less digits than its factorization.

29031430818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3883.

The product of its (nonzero) digits is 41472, while the sum is 39.

The spelling of 29031430818 in words is "twenty-nine billion, thirty-one million, four hundred thirty thousand, eight hundred eighteen".