29681139813 has 32 divisors (see below), whose sum is σ = 44085092352. Its totient is φ = 17639467200.

The previous prime is 29681139809. The next prime is 29681139821. The reversal of 29681139813 is 31893118692.

It is not a de Polignac number, because 29681139813 - 2² = 29681139809 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29681139823) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 563578 + ... + 613988.

It is an arithmetic number, because the mean of its divisors is an integer number (1377659136).

Almost surely, 2^29681139813 is an apocalyptic number.

It is an amenable number.

29681139813 is a deficient number, since it is larger than the sum of its proper divisors (14403952539).

29681139813 is a wasteful number, since it uses less digits than its factorization.

29681139813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50945.

The product of its digits is 559872, while the sum is 51.

The spelling of 29681139813 in words is "twenty-nine billion, six hundred eighty-one million, one hundred thirty-nine thousand, eight hundred thirteen".