29950821 has 24 divisors (see below), whose sum is σ = 48222720. Its totient is φ = 17801856.

The previous prime is 29950801. The next prime is 29950829. The reversal of 29950821 is 12805992.

It is not a de Polignac number, because 29950821 - 2¹⁷ = 29819749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29950829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2245 + ... + 8058.

It is an arithmetic number, because the mean of its divisors is an integer number (2009280).

Almost surely, 2^29950821 is an apocalyptic number.

It is an amenable number.

29950821 is a deficient number, since it is larger than the sum of its proper divisors (18271899).

29950821 is a wasteful number, since it uses less digits than its factorization.

29950821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10345 (or 10342 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 29950821 is about 5472.7343257279. The cubic root of 29950821 is about 310.5533681906.

The spelling of 29950821 in words is "twenty-nine million, nine hundred fifty thousand, eight hundred twenty-one".