21300274 has 12 divisors (see below), whose sum is σ = 32338494. Its totient is φ = 10521504.

The previous prime is 21300233. The next prime is 21300287. The reversal of 21300274 is 47200312.

It can be written as a sum of positive squares in only one way, i.e., 21206025 + 94249 = 4605^2 + 307^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 69229 + ... + 69535.

Almost surely, 2^21300274 is an apocalyptic number.

21300274 is a deficient number, since it is larger than the sum of its proper divisors (11038220).

21300274 is an equidigital number, since it uses as much as digits as its factorization.

21300274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 21300274 is about 4615.2219881605. The cubic root of 21300274 is about 277.2011727894.

Adding to 21300274 its reverse (47200312), we get a palindrome (68500586).

The spelling of 21300274 in words is "twenty-one million, three hundred thousand, two hundred seventy-four".