29217970980 has 144 divisors (see below), whose sum is σ = 96816964608. Its totient is φ = 7073472000.

The previous prime is 29217970937. The next prime is 29217970981. The reversal of 29217970980 is 8907971292.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (29217970981) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1497085 + ... + 1516475.

It is an arithmetic number, because the mean of its divisors is an integer number (672340032).

Almost surely, 2^29217970980 is an apocalyptic number.

29217970980 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 29217970980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48408482304).

29217970980 is an abundant number, since it is smaller than the sum of its proper divisors (67598993628).

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

29217970980 is a wasteful number, since it uses less digits than its factorization.

29217970980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20178 (or 20173 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 54.

The spelling of 29217970980 in words is "twenty-nine billion, two hundred seventeen million, nine hundred seventy thousand, nine hundred eighty".