21774550744 has 8 divisors (see below), whose sum is σ = 40827282660. Its totient is φ = 10887275368.

The previous prime is 21774550739. The next prime is 21774550757. The reversal of 21774550744 is 44705547712.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 21774550694 and 21774550703.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1360909414 + ... + 1360909429.

Almost surely, 2^21774550744 is an apocalyptic number.

It is an amenable number.

21774550744 is a deficient number, since it is larger than the sum of its proper divisors (19052731916).

21774550744 is a wasteful number, since it uses less digits than its factorization.

21774550744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2721818849 (or 2721818845 counting only the distinct ones).

The product of its (nonzero) digits is 1097600, while the sum is 46.

The spelling of 21774550744 in words is "twenty-one billion, seven hundred seventy-four million, five hundred fifty thousand, seven hundred forty-four".