20217124013888 has 14 divisors (see below), whose sum is σ = 40118355465186. Its totient is φ = 10108562006912.

The previous prime is 20217124013881. The next prime is 20217124013927. The reversal of 20217124013888 is 88831042171202.

It can be written as a sum of positive squares in only one way, i.e., 19358521628224 + 858602385664 = 4399832^2 + 926608^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20217124013881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157946281295 + ... + 157946281422.

Almost surely, 2^{20217124013888} is an apocalyptic number.

It is an amenable number.

20217124013888 is a deficient number, since it is larger than the sum of its proper divisors (19901231451298).

20217124013888 is an equidigital number, since it uses as much as digits as its factorization.

20217124013888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315892562729 (or 315892562719 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 47.

The spelling of 20217124013888 in words is "twenty trillion, two hundred seventeen billion, one hundred twenty-four million, thirteen thousand, eight hundred eighty-eight".