20705381744272 has 40 divisors (see below), whose sum is σ = 42558010713432. Its totient is φ = 9725007052800.

The previous prime is 20705381744261. The next prime is 20705381744339. The reversal of 20705381744272 is 27244718350702.

It can be written as a sum of positive squares in 4 ways, for example, as 6753782230416 + 13951599513856 = 2598804^2 + 3735184^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72912729 + ... + 73196152.

Almost surely, 2^{20705381744272} is an apocalyptic number.

It is an amenable number.

20705381744272 is an abundant number, since it is smaller than the sum of its proper divisors (21852628969160).

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

20705381744272 is a wasteful number, since it uses less digits than its factorization.

20705381744272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146109427 (or 146109421 counting only the distinct ones).

The product of its (nonzero) digits is 5268480, while the sum is 52.

The spelling of 20705381744272 in words is "twenty trillion, seven hundred five billion, three hundred eighty-one million, seven hundred forty-four thousand, two hundred seventy-two".