29908691811 has 24 divisors (see below), whose sum is σ = 43892527536. Its totient is φ = 19621405440.

The previous prime is 29908691809. The next prime is 29908691833. The reversal of 29908691811 is 11819680992.

It is not a de Polignac number, because 29908691811 - 2¹ = 29908691809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (29908691801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 239671 + ... + 342431.

It is an arithmetic number, because the mean of its divisors is an integer number (1828855314).

Almost surely, 2^29908691811 is an apocalyptic number.

29908691811 is a deficient number, since it is larger than the sum of its proper divisors (13983835725).

29908691811 is a wasteful number, since it uses less digits than its factorization.

29908691811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103283 (or 103280 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 54.

The spelling of 29908691811 in words is "twenty-nine billion, nine hundred eight million, six hundred ninety-one thousand, eight hundred eleven".