21024010 has 16 divisors (see below), whose sum is σ = 43249536. Its totient is φ = 7208208.

The previous prime is 21023971. The next prime is 21024067. The reversal of 21024010 is 1042012.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150102 + ... + 150241.

It is an arithmetic number, because the mean of its divisors is an integer number (2703096).

Almost surely, 2^21024010 is an apocalyptic number.

21024010 is an abundant number, since it is smaller than the sum of its proper divisors (22225526).

21024010 is a wasteful number, since it uses less digits than its factorization.

21024010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300357.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 21024010 is about 4585.1946523566. The cubic root of 21024010 is about 275.9975232572.

Adding to 21024010 its reverse (1042012), we get a palindrome (22066022).

The spelling of 21024010 in words is "twenty-one million, twenty-four thousand, ten".