29031430820 has 96 divisors (see below), whose sum is σ = 71472844800. Its totient is φ = 9901073280.

The previous prime is 29031430811. The next prime is 29031430843. The reversal of 29031430820 is 2803413092.

It is a happy number.

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, 1299182 + ... + 1321338.

It is an arithmetic number, because the mean of its divisors is an integer number (744508800).

Almost surely, 2^29031430820 is an apocalyptic number.

29031430820 is a gapful number since it is divisible by the number (20) 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 29031430820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35736422400).

29031430820 is an abundant number, since it is smaller than the sum of its proper divisors (42441413980).

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

29031430820 is a wasteful number, since it uses less digits than its factorization.

29031430820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22378 (or 22362 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The spelling of 29031430820 in words is "twenty-nine billion, thirty-one million, four hundred thirty thousand, eight hundred twenty".