21773017704 has 64 divisors (see below), whose sum is σ = 55132070400. Its totient is φ = 7164889344.

The previous prime is 21773017703. The next prime is 21773017709. The reversal of 21773017704 is 40771037712.

It is not an unprimeable number, because it can be changed into a prime (21773017703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 709609 + ... + 739655.

It is an arithmetic number, because the mean of its divisors is an integer number (861438600).

Almost surely, 2^21773017704 is an apocalyptic number.

21773017704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21773017704 is an abundant number, since it is smaller than the sum of its proper divisors (33359052696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21773017704 is a wasteful number, since it uses less digits than its factorization.

21773017704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30442 (or 30438 counting only the distinct ones).

The product of its (nonzero) digits is 57624, while the sum is 39.

The spelling of 21773017704 in words is "twenty-one billion, seven hundred seventy-three million, seventeen thousand, seven hundred four".