21452030 has 16 divisors (see below), whose sum is σ = 38671344. Its totient is φ = 8568000.

The previous prime is 21452029. The next prime is 21452051. The reversal of 21452030 is 3025412.

It is a super-2 number, since 2×21452030² = 920379182241800, which contains 22 as substring.

It is a plaindrome in base 11.

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, 8405 + ... + 10655.

It is an arithmetic number, because the mean of its divisors is an integer number (2416959).

Almost surely, 2^21452030 is an apocalyptic number.

21452030 is a deficient number, since it is larger than the sum of its proper divisors (17219314).

21452030 is a wasteful number, since it uses less digits than its factorization.

21452030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3211.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 21452030 is about 4631.6336210888. The cubic root of 21452030 is about 277.8579316542.

Adding to 21452030 its reverse (3025412), we get a palindrome (24477442).

The spelling of 21452030 in words is "twenty-one million, four hundred fifty-two thousand, thirty".