29900980181 has 4 divisors (see below), whose sum is σ = 31474716000. Its totient is φ = 28327244364.

The previous prime is 29900980139. The next prime is 29900980201. The reversal of 29900980181 is 18108900992.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 29900980181 - 2⁶ = 29900980117 is a prime.

It is a super-2 number, since 2×29900980181² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29900980981) 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, 786867881 + ... + 786867918.

It is an arithmetic number, because the mean of its divisors is an integer number (7868679000).

Almost surely, 2^29900980181 is an apocalyptic number.

It is an amenable number.

29900980181 is a deficient number, since it is larger than the sum of its proper divisors (1573735819).

29900980181 is a wasteful number, since it uses less digits than its factorization.

29900980181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573735818.

The product of its (nonzero) digits is 93312, while the sum is 47.

The spelling of 29900980181 in words is "twenty-nine billion, nine hundred million, nine hundred eighty thousand, one hundred eighty-one".