29801821135 has 4 divisors (see below), whose sum is σ = 35762185368. Its totient is φ = 23841456904.

The previous prime is 29801821121. The next prime is 29801821171. The reversal of 29801821135 is 53112810892.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 29801821135 - 2⁵ = 29801821103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2980182109 + ... + 2980182118.

It is an arithmetic number, because the mean of its divisors is an integer number (8940546342).

Almost surely, 2^29801821135 is an apocalyptic number.

29801821135 is a deficient number, since it is larger than the sum of its proper divisors (5960364233).

29801821135 is an equidigital number, since it uses as much as digits as its factorization.

29801821135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5960364232.

The product of its (nonzero) digits is 34560, while the sum is 40.

The spelling of 29801821135 in words is "twenty-nine billion, eight hundred one million, eight hundred twenty-one thousand, one hundred thirty-five".