21014452 has 12 divisors (see below), whose sum is σ = 37558080. Its totient is φ = 10283576.

The previous prime is 21014429. The next prime is 21014453. The reversal of 21014452 is 25441012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55702 + ... + 56077.

It is an arithmetic number, because the mean of its divisors is an integer number (3129840).

Almost surely, 2^21014452 is an apocalyptic number.

It is an amenable number.

21014452 is a deficient number, since it is larger than the sum of its proper divisors (16543628).

21014452 is a wasteful number, since it uses less digits than its factorization.

21014452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111830 (or 111828 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 21014452 is about 4584.1522662320. The cubic root of 21014452 is about 275.9556919702.

Adding to 21014452 its reverse (25441012), we get a palindrome (46455464).

The spelling of 21014452 in words is "twenty-one million, fourteen thousand, four hundred fifty-two".