21014434 has 12 divisors (see below), whose sum is σ = 36668214. Its totient is φ = 9006144.

The previous prime is 21014429. The next prime is 21014453. The reversal of 21014434 is 43441012.

It can be written as a sum of positive squares in only one way, i.e., 10870209 + 10144225 = 3297^2 + 3185^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 107119 + ... + 107314.

Almost surely, 2^21014434 is an apocalyptic number.

21014434 is a deficient number, since it is larger than the sum of its proper divisors (15653780).

21014434 is a wasteful number, since it uses less digits than its factorization.

21014434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214449 (or 214442 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 21014434 is about 4584.1503029460. The cubic root of 21014434 is about 275.9556131799.

Adding to 21014434 its reverse (43441012), we get a palindrome (64455446).

The spelling of 21014434 in words is "twenty-one million, fourteen thousand, four hundred thirty-four".