29999999919 has 16 divisors (see below), whose sum is σ = 40609484384. Its totient is φ = 19696089600.

The previous prime is 29999999899. The next prime is 29999999921. The reversal of 29999999919 is 91999999992.

It is not a de Polignac number, because 29999999919 - 2¹¹ = 29999997871 is a prime.

It is a super-2 number, since 2×29999999919² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29999999959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41139 + ... + 248379.

It is an arithmetic number, because the mean of its divisors is an integer number (2538092774).

Almost surely, 2^29999999919 is an apocalyptic number.

29999999919 is a deficient number, since it is larger than the sum of its proper divisors (10609484465).

29999999919 is a wasteful number, since it uses less digits than its factorization.

29999999919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207978.

The product of its digits is 774840978, while the sum is 84.

Adding to 29999999919 its sum of digits (84), we get a palindrome (30000000003).

The spelling of 29999999919 in words is "twenty-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred nineteen".