29820829639 has 16 divisors (see below), whose sum is σ = 31337435520. Its totient is φ = 28351897600.

The previous prime is 29820829627. The next prime is 29820829729. The reversal of 29820829639 is 93692802892.

It is a cyclic number.

It is not a de Polignac number, because 29820829639 - 2¹¹ = 29820827591 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 (29820829609) 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, 192327 + ... + 310855.

It is an arithmetic number, because the mean of its divisors is an integer number (1958589720).

Almost surely, 2^29820829639 is an apocalyptic number.

29820829639 is a deficient number, since it is larger than the sum of its proper divisors (1516605881).

29820829639 is a wasteful number, since it uses less digits than its factorization.

29820829639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118730.

The product of its (nonzero) digits is 6718464, while the sum is 58.

The spelling of 29820829639 in words is "twenty-nine billion, eight hundred twenty million, eight hundred twenty-nine thousand, six hundred thirty-nine".