21035016 has 48 divisors (see below), whose sum is σ = 57183360. Its totient is φ = 6985440.

The previous prime is 21034999. The next prime is 21035029. The reversal of 21035016 is 61053012.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 21035016.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33021 + ... + 33651.

It is an arithmetic number, because the mean of its divisors is an integer number (1191320).

Almost surely, 2^21035016 is an apocalyptic number.

It is an amenable number.

21035016 is an abundant number, since it is smaller than the sum of its proper divisors (36148344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21035016 is a wasteful number, since it uses less digits than its factorization.

21035016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106 (or 1099 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 21035016 is about 4586.3946624773. The cubic root of 21035016 is about 276.0456761204.

Adding to 21035016 its reverse (61053012), we get a palindrome (82088028).

The spelling of 21035016 in words is "twenty-one million, thirty-five thousand, sixteen".