29121929868 has 24 divisors (see below), whose sum is σ = 68102521200. Its totient is φ = 9685688320.

The previous prime is 29121929861. The next prime is 29121929873. The reversal of 29121929868 is 86892912192.

It is not an unprimeable number, because it can be changed into a prime (29121929861) 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, 2697093 + ... + 2707868.

It is an arithmetic number, because the mean of its divisors is an integer number (2837605050).

Almost surely, 2^29121929868 is an apocalyptic number.

It is an amenable number.

29121929868 is an abundant number, since it is smaller than the sum of its proper divisors (38980591332).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

29121929868 is a wasteful number, since it uses less digits than its factorization.

29121929868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5405417 (or 5405415 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 57.

The spelling of 29121929868 in words is "twenty-nine billion, one hundred twenty-one million, nine hundred twenty-nine thousand, eight hundred sixty-eight".