29784704225 has 12 divisors (see below), whose sum is σ = 39105565164. Its totient is φ = 22426129920.

The previous prime is 29784704221. The next prime is 29784704251. The reversal of 29784704225 is 52240748792.

It can be written as a sum of positive squares in 6 ways, for example, as 2098739344 + 27685964881 = 45812^2 + 166391^2 .

It is not a de Polignac number, because 29784704225 - 2² = 29784704221 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29784704221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35040404 + ... + 35041253.

It is an arithmetic number, because the mean of its divisors is an integer number (3258797097).

Almost surely, 2^29784704225 is an apocalyptic number.

29784704225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

29784704225 is a deficient number, since it is larger than the sum of its proper divisors (9320860939).

29784704225 is a wasteful number, since it uses less digits than its factorization.

29784704225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70081684 (or 70081679 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 50.

The spelling of 29784704225 in words is "twenty-nine billion, seven hundred eighty-four million, seven hundred four thousand, two hundred twenty-five".