21774046210 has 24 divisors (see below), whose sum is σ = 45592187580. Its totient is φ = 7465387104.

The previous prime is 21774046201. The next prime is 21774046211. The reversal of 21774046210 is 1264047712.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17553335121 + 4220711089 = 132489^2 + 64967^2 .

It is not an unprimeable number, because it can be changed into a prime (21774046211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22217925 + ... + 22218904.

Almost surely, 2^21774046210 is an apocalyptic number.

21774046210 is an abundant number, since it is smaller than the sum of its proper divisors (23818141370).

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

21774046210 is a wasteful number, since it uses less digits than its factorization.

21774046210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44436850 (or 44436843 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 34.

The spelling of 21774046210 in words is "twenty-one billion, seven hundred seventy-four million, forty-six thousand, two hundred ten".