21027452 has 24 divisors (see below), whose sum is σ = 38897040. Its totient is φ = 9918720.

The previous prime is 21027449. The next prime is 21027463. The reversal of 21027452 is 25472012.

It is a happy number.

It is a super-2 number, since 2×21027452² = 884307475224608, which contains 22 as substring.

It is a congruent number.

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, 25202 + ... + 26022.

It is an arithmetic number, because the mean of its divisors is an integer number (1620710).

Almost surely, 2^21027452 is an apocalyptic number.

It is an amenable number.

21027452 is a deficient number, since it is larger than the sum of its proper divisors (17869588).

21027452 is a wasteful number, since it uses less digits than its factorization.

21027452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181 (or 1179 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 21027452 is about 4585.5699754774. The cubic root of 21027452 is about 276.0125843173.

Adding to 21027452 its reverse (25472012), we get a palindrome (46499464).

The spelling of 21027452 in words is "twenty-one million, twenty-seven thousand, four hundred fifty-two".