21223340774 has 8 divisors (see below), whose sum is σ = 32512351968. Its totient is φ = 10385890120.

The previous prime is 21223340741. The next prime is 21223340777. The reversal of 21223340774 is 47704332212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223340777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112890017 + ... + 112890204.

It is an arithmetic number, because the mean of its divisors is an integer number (4064043996).

Almost surely, 2^21223340774 is an apocalyptic number.

21223340774 is a deficient number, since it is larger than the sum of its proper divisors (11289011194).

21223340774 is a wasteful number, since it uses less digits than its factorization.

21223340774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225780270.

The product of its (nonzero) digits is 56448, while the sum is 35.

Adding to 21223340774 its reverse (47704332212), we get a palindrome (68927672986).

The spelling of 21223340774 in words is "twenty-one billion, two hundred twenty-three million, three hundred forty thousand, seven hundred seventy-four".