29887129975 has 12 divisors (see below), whose sum is σ = 37688179320. Its totient is φ = 23504453600.

The previous prime is 29887129969. The next prime is 29887130029. The reversal of 29887129975 is 57992178892.

It is not a de Polignac number, because 29887129975 - 2⁷ = 29887129847 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 29887129975.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10129756 + ... + 10132705.

It is an arithmetic number, because the mean of its divisors is an integer number (3140681610).

Almost surely, 2^29887129975 is an apocalyptic number.

29887129975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

29887129975 is a deficient number, since it is larger than the sum of its proper divisors (7801049345).

29887129975 is a wasteful number, since it uses less digits than its factorization.

29887129975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20262530 (or 20262525 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 67.

The spelling of 29887129975 in words is "twenty-nine billion, eight hundred eighty-seven million, one hundred twenty-nine thousand, nine hundred seventy-five".