21411434 has 24 divisors (see below), whose sum is σ = 35686560. Its totient is φ = 9626760.

The previous prime is 21411433. The next prime is 21411437. The reversal of 21411434 is 43411412.

It is not an unprimeable number, because it can be changed into a prime (21411431) 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, 24497 + ... + 25355.

It is an arithmetic number, because the mean of its divisors is an integer number (1486940).

Almost surely, 2^21411434 is an apocalyptic number.

21411434 is a deficient number, since it is larger than the sum of its proper divisors (14275126).

21411434 is a wasteful number, since it uses less digits than its factorization.

21411434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986 (or 975 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 21411434 is about 4627.2490747743. The cubic root of 21411434 is about 277.6825474212.

Adding to 21411434 its reverse (43411412), we get a palindrome (64822846).

The spelling of 21411434 in words is "twenty-one million, four hundred eleven thousand, four hundred thirty-four".