21774909674 has 8 divisors (see below), whose sum is σ = 37328416608. Its totient is φ = 9332104140.

The previous prime is 21774909643. The next prime is 21774909677. The reversal of 21774909674 is 47690947712.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21774909677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 777675332 + ... + 777675359.

It is an arithmetic number, because the mean of its divisors is an integer number (4666052076).

Almost surely, 2^21774909674 is an apocalyptic number.

21774909674 is a deficient number, since it is larger than the sum of its proper divisors (15553506934).

21774909674 is a wasteful number, since it uses less digits than its factorization.

21774909674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555350700.

The product of its (nonzero) digits is 5334336, while the sum is 56.

The spelling of 21774909674 in words is "twenty-one billion, seven hundred seventy-four million, nine hundred nine thousand, six hundred seventy-four".