29231212920 has 256 divisors, whose sum is σ = 109544279040. Its totient is φ = 6075260928.

The previous prime is 29231212909. The next prime is 29231212961. The reversal of 29231212920 is 2921213292.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 711664 + ... + 751616.

It is an arithmetic number, because the mean of its divisors is an integer number (427907340).

Almost surely, 2^29231212920 is an apocalyptic number.

29231212920 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 29231212920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54772139520).

29231212920 is an abundant number, since it is smaller than the sum of its proper divisors (80313066120).

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

29231212920 is a wasteful number, since it uses less digits than its factorization.

29231212920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40054 (or 40050 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The spelling of 29231212920 in words is "twenty-nine billion, two hundred thirty-one million, two hundred twelve thousand, nine hundred twenty".