20244781645012 has 24 divisors (see below), whose sum is σ = 36574419320936. Its totient is φ = 9797782560768.

The previous prime is 20244781644977. The next prime is 20244781645013. The reversal of 20244781645012 is 21054618744202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3782075899536 + 16462705745476 = 1944756^2 + 4057426^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20244781645013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354347253 + ... + 354404380.

Almost surely, 2^{20244781645012} is an apocalyptic number.

It is an amenable number.

20244781645012 is a deficient number, since it is larger than the sum of its proper divisors (16329637675924).

20244781645012 is a wasteful number, since it uses less digits than its factorization.

20244781645012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708751867 (or 708751865 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 46.

The spelling of 20244781645012 in words is "twenty trillion, two hundred forty-four billion, seven hundred eighty-one million, six hundred forty-five thousand, twelve".