21774496 has 12 divisors (see below), whose sum is σ = 42868602. Its totient is φ = 10887232.

The previous prime is 21774479. The next prime is 21774517. The reversal of 21774496 is 69447712.

It can be written as a sum of positive squares in only one way, i.e., 15840400 + 5934096 = 3980^2 + 2436^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340195 + ... + 340258.

Almost surely, 2^21774496 is an apocalyptic number.

It is an amenable number.

21774496 is a deficient number, since it is larger than the sum of its proper divisors (21094106).

21774496 is an equidigital number, since it uses as much as digits as its factorization.

21774496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680463 (or 680455 counting only the distinct ones).

The product of its digits is 84672, while the sum is 40.

The square root of 21774496 is about 4666.3150343713. The cubic root of 21774496 is about 279.2432627820.

The spelling of 21774496 in words is "twenty-one million, seven hundred seventy-four thousand, four hundred ninety-six".