29982421 has 4 divisors (see below), whose sum is σ = 34265632. Its totient is φ = 25699212.

The previous prime is 29982367. The next prime is 29982431. The reversal of 29982421 is 12428992.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 29982421 - 2¹¹ = 29980373 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 (29982431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2141595 + ... + 2141608.

It is an arithmetic number, because the mean of its divisors is an integer number (8566408).

Almost surely, 2^29982421 is an apocalyptic number.

It is an amenable number.

29982421 is a deficient number, since it is larger than the sum of its proper divisors (4283211).

29982421 is an equidigital number, since it uses as much as digits as its factorization.

29982421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4283210.

The product of its digits is 20736, while the sum is 37.

The square root of 29982421 is about 5475.6206040959. The cubic root of 29982421 is about 310.6625475814.

It can be divided in two parts, 29982 and 421, that added together give a palindrome (30403).

The spelling of 29982421 in words is "twenty-nine million, nine hundred eighty-two thousand, four hundred twenty-one".