29708129812 has 12 divisors (see below), whose sum is σ = 53257257396. Its totient is φ = 14491770560.

The previous prime is 29708129807. The next prime is 29708129819. The reversal of 29708129812 is 21892180792.

It can be written as a sum of positive squares in 2 ways, for example, as 14072127876 + 15636001936 = 118626^2 + 125044^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29708129819) 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, 90573403 + ... + 90573730.

It is an arithmetic number, because the mean of its divisors is an integer number (4438104783).

Almost surely, 2^29708129812 is an apocalyptic number.

It is an amenable number.

29708129812 is a deficient number, since it is larger than the sum of its proper divisors (23549127584).

29708129812 is a wasteful number, since it uses less digits than its factorization.

29708129812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181147178 (or 181147176 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 49.

The spelling of 29708129812 in words is "twenty-nine billion, seven hundred eight million, one hundred twenty-nine thousand, eight hundred twelve".