29958021 has 12 divisors (see below), whose sum is σ = 43362540. Its totient is φ = 19930560.

The previous prime is 29958011. The next prime is 29958031. The reversal of 29958021 is 12085992.

It is an interprime number because it is at equal distance from previous prime (29958011) and next prime (29958031).

It can be written as a sum of positive squares in 2 ways, for example, as 2772225 + 27185796 = 1665^2 + 5214^2 .

It is not a de Polignac number, because 29958021 - 2¹¹ = 29955973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29958001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1495 + ... + 7883.

It is an arithmetic number, because the mean of its divisors is an integer number (3613545).

Almost surely, 2^29958021 is an apocalyptic number.

It is an amenable number.

29958021 is a deficient number, since it is larger than the sum of its proper divisors (13404519).

29958021 is a wasteful number, since it uses less digits than its factorization.

29958021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6916 (or 6913 counting only the distinct ones).

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

The square root of 29958021 is about 5473.3920926606. The cubic root of 29958021 is about 310.5782512603.

The spelling of 29958021 in words is "twenty-nine million, nine hundred fifty-eight thousand, twenty-one".