29996249905 has 36 divisors (see below), whose sum is σ = 39351684060. Its totient is φ = 21921072768.

The previous prime is 29996249863. The next prime is 29996249929. The reversal of 29996249905 is 50994269992.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 108409744 + 29887840161 = 10412^2 + 172881^2 .

It is not a de Polignac number, because 29996249905 - 2¹¹ = 29996247857 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 39624787 + ... + 39625543.

It is an arithmetic number, because the mean of its divisors is an integer number (1093102335).

Almost surely, 2^29996249905 is an apocalyptic number.

It is an amenable number.

29996249905 is a deficient number, since it is larger than the sum of its proper divisors (9355434155).

29996249905 is an frugal number, since it uses more digits than its factorization.

29996249905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586 (or 810 counting only the distinct ones).

The product of its (nonzero) digits is 28343520, while the sum is 64.

The spelling of 29996249905 in words is "twenty-nine billion, nine hundred ninety-six million, two hundred forty-nine thousand, nine hundred five".