21080652 has 24 divisors (see below), whose sum is σ = 51777600. Its totient is φ = 6656976.

The previous prime is 21080623. The next prime is 21080659. The reversal of 21080652 is 25608012.

It is not an unprimeable number, because it can be changed into a prime (21080659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46002 + ... + 46457.

It is an arithmetic number, because the mean of its divisors is an integer number (2157400).

Almost surely, 2^21080652 is an apocalyptic number.

It is an amenable number.

21080652 is an abundant number, since it is smaller than the sum of its proper divisors (30696948).

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

21080652 is a wasteful number, since it uses less digits than its factorization.

21080652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92485 (or 92483 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 21080652 is about 4591.3671166658. The cubic root of 21080652 is about 276.2451612892.

Adding to 21080652 its reverse (25608012), we get a palindrome (46688664).

The spelling of 21080652 in words is "twenty-one million, eighty thousand, six hundred fifty-two".