21652010 has 8 divisors (see below), whose sum is σ = 38973636. Its totient is φ = 8660800.

The previous prime is 21652003. The next prime is 21652061. The reversal of 21652010 is 1025612.

It can be written as a sum of positive squares in 2 ways, for example, as 21613201 + 38809 = 4649^2 + 197^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21652010.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1082591 + ... + 1082610.

Almost surely, 2^21652010 is an apocalyptic number.

21652010 is a deficient number, since it is larger than the sum of its proper divisors (17321626).

21652010 is a wasteful number, since it uses less digits than its factorization.

21652010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2165208.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 21652010 is about 4653.1720363640. The cubic root of 21652010 is about 278.7186777329.

Adding to 21652010 its reverse (1025612), we get a palindrome (22677622).

The spelling of 21652010 in words is "twenty-one million, six hundred fifty-two thousand, ten".