29951220000 has 960 divisors, whose sum is σ = 116386744320. Its totient is φ = 6676992000.

The previous prime is 29951219989. The next prime is 29951220029. The reversal of 29951220000 is 2215992.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 29951220000.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 637259977 + ... + 637260023.

It is an arithmetic number, because the mean of its divisors is an integer number (121236192).

Almost surely, 2^29951220000 is an apocalyptic number.

29951220000 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 29951220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58193372160).

29951220000 is an abundant number, since it is smaller than the sum of its proper divisors (86435524320).

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

29951220000 is a wasteful number, since it uses less digits than its factorization.

29951220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

Adding to 29951220000 its reverse (2215992), we get a palindrome (29953435992).

The spelling of 29951220000 in words is "twenty-nine billion, nine hundred fifty-one million, two hundred twenty thousand".