29519811917 has 4 divisors (see below), whose sum is σ = 29669658876. Its totient is φ = 29369964960.

The previous prime is 29519811911. The next prime is 29519811943. The reversal of 29519811917 is 71911891592.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12917231716 + 16602580201 = 113654^2 + 128851^2 .

It is a cyclic number.

It is not a de Polignac number, because 29519811917 - 2⁴ = 29519811901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29519811911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74923184 + ... + 74923577.

It is an arithmetic number, because the mean of its divisors is an integer number (7417414719).

Almost surely, 2^29519811917 is an apocalyptic number.

It is an amenable number.

29519811917 is a deficient number, since it is larger than the sum of its proper divisors (149846959).

29519811917 is a wasteful number, since it uses less digits than its factorization.

29519811917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149846958.

The product of its digits is 408240, while the sum is 53.

The spelling of 29519811917 in words is "twenty-nine billion, five hundred nineteen million, eight hundred eleven thousand, nine hundred seventeen".