21774747363 has 4 divisors (see below), whose sum is σ = 29032996488. Its totient is φ = 14516498240.

The previous prime is 21774747349. The next prime is 21774747367. The reversal of 21774747363 is 36374747712.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21774747363 - 2¹⁶ = 21774681827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21774747367) 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, 3629124558 + ... + 3629124563.

It is an arithmetic number, because the mean of its divisors is an integer number (7258249122).

Almost surely, 2^21774747363 is an apocalyptic number.

21774747363 is a deficient number, since it is larger than the sum of its proper divisors (7258249125).

21774747363 is an equidigital number, since it uses as much as digits as its factorization.

21774747363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7258249124.

The product of its digits is 4148928, while the sum is 51.

The spelling of 21774747363 in words is "twenty-one billion, seven hundred seventy-four million, seven hundred forty-seven thousand, three hundred sixty-three".