21016414 has 4 divisors (see below), whose sum is σ = 31524624. Its totient is φ = 10508206.

The previous prime is 21016409. The next prime is 21016417. The reversal of 21016414 is 41461012.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21016391 and 21016400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21016417) 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 as a sum of consecutive naturals, namely, 5254102 + ... + 5254105.

It is an arithmetic number, because the mean of its divisors is an integer number (7881156).

Almost surely, 2^21016414 is an apocalyptic number.

21016414 is a deficient number, since it is larger than the sum of its proper divisors (10508210).

21016414 is a wasteful number, since it uses less digits than its factorization.

21016414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10508209.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 21016414 is about 4584.3662593645. The cubic root of 21016414 is about 275.9642798413.

Adding to 21016414 its reverse (41461012), we get a palindrome (62477426).

It can be divided in two parts, 2101 and 6414, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 21016414 in words is "twenty-one million, sixteen thousand, four hundred fourteen".