21016462 has 4 divisors (see below), whose sum is σ = 31524696. Its totient is φ = 10508230.

The previous prime is 21016459. The next prime is 21016469. The reversal of 21016462 is 26461012.

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

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21016469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5254114 + ... + 5254117.

It is an arithmetic number, because the mean of its divisors is an integer number (7881174).

Almost surely, 2^21016462 is an apocalyptic number.

21016462 is a deficient number, since it is larger than the sum of its proper divisors (10508234).

21016462 is a wasteful number, since it uses less digits than its factorization.

21016462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10508233.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 21016462 is about 4584.3714945454. The cubic root of 21016462 is about 275.9644899354.

Adding to 21016462 its reverse (26461012), we get a palindrome (47477474).

The spelling of 21016462 in words is "twenty-one million, sixteen thousand, four hundred sixty-two".