21060274 has 4 divisors (see below), whose sum is σ = 31590414. Its totient is φ = 10530136.

The previous prime is 21060269. The next prime is 21060287. The reversal of 21060274 is 47206012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16459249 + 4601025 = 4057^2 + 2145^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5265067 + ... + 5265070.

Almost surely, 2^21060274 is an apocalyptic number.

21060274 is a deficient number, since it is larger than the sum of its proper divisors (10530140).

21060274 is a wasteful number, since it uses less digits than its factorization.

21060274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10530139.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 21060274 is about 4589.1474153703. The cubic root of 21060274 is about 276.1561201032.

Adding to 21060274 its reverse (47206012), we get a palindrome (68266286).

The spelling of 21060274 in words is "twenty-one million, sixty thousand, two hundred seventy-four".