29908691812 has 24 divisors (see below), whose sum is σ = 52865809920. Its totient is φ = 14804411040.

The previous prime is 29908691809. The next prime is 29908691833. The reversal of 29908691812 is 21819680992.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 488637 + ... + 546427.

It is an arithmetic number, because the mean of its divisors is an integer number (2202742080).

Almost surely, 2^29908691812 is an apocalyptic number.

It is an amenable number.

29908691812 is a deficient number, since it is larger than the sum of its proper divisors (22957118108).

29908691812 is a wasteful number, since it uses less digits than its factorization.

29908691812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59091 (or 59089 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 55.

It can be divided in two parts, 2990869 and 1812, that added together give a triangular number (2992681 = T₂₄₄₆).

The spelling of 29908691812 in words is "twenty-nine billion, nine hundred eight million, six hundred ninety-one thousand, eight hundred twelve".