21465674 has 4 divisors (see below), whose sum is σ = 32198514. Its totient is φ = 10732836.

The previous prime is 21465659. The next prime is 21465683. The reversal of 21465674 is 47656412.

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., 21114025 + 351649 = 4595^2 + 593^2 .

It is a Curzon 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, 5366417 + ... + 5366420.

Almost surely, 2^21465674 is an apocalyptic number.

21465674 is a deficient number, since it is larger than the sum of its proper divisors (10732840).

21465674 is a wasteful number, since it uses less digits than its factorization.

21465674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10732839.

The product of its digits is 40320, while the sum is 35.

The square root of 21465674 is about 4633.1063013922. The cubic root of 21465674 is about 277.9168272485.

The spelling of 21465674 in words is "twenty-one million, four hundred sixty-five thousand, six hundred seventy-four".