29471205981 has 8 divisors (see below), whose sum is σ = 44908504384. Its totient is φ = 16840689120.

The previous prime is 29471205943. The next prime is 29471206003. The reversal of 29471205981 is 18950217492.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 29471205981 - 2¹⁵ = 29471173213 is a prime.

It is a super-2 number, since 2×29471205981² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 29471205981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29471205901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 701695360 + ... + 701695401.

It is an arithmetic number, because the mean of its divisors is an integer number (5613563048).

Almost surely, 2^29471205981 is an apocalyptic number.

29471205981 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

29471205981 is a deficient number, since it is larger than the sum of its proper divisors (15437298403).

29471205981 is a wasteful number, since it uses less digits than its factorization.

29471205981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403390771.

The product of its (nonzero) digits is 362880, while the sum is 48.

The spelling of 29471205981 in words is "twenty-nine billion, four hundred seventy-one million, two hundred five thousand, nine hundred eighty-one".