29189817427 has 4 divisors (see below), whose sum is σ = 29210683600. Its totient is φ = 29168951256.

The previous prime is 29189817421. The next prime is 29189817451. The reversal of 29189817427 is 72471898192.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29189817427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29189817421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10430988 + ... + 10433785.

It is an arithmetic number, because the mean of its divisors is an integer number (7302670900).

Almost surely, 2^29189817427 is an apocalyptic number.

29189817427 is a deficient number, since it is larger than the sum of its proper divisors (20866173).

29189817427 is a wasteful number, since it uses less digits than its factorization.

29189817427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20866172.

The product of its digits is 4064256, while the sum is 58.

The spelling of 29189817427 in words is "twenty-nine billion, one hundred eighty-nine million, eight hundred seventeen thousand, four hundred twenty-seven".