20307749113744 has 45 divisors (see below), whose sum is σ = 39721195207057. Its totient is φ = 10058023173632.

The previous prime is 20307749113733. The next prime is 20307749113763. The reversal of 20307749113744 is 44731194770302.

The square root of 20307749113744 is 4506412.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 16431575673744 + 3876173440000 = 4053588^2 + 1968800^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20307749113691 and 20307749113700.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1928739072 + ... + 1928749600.

Almost surely, 2^{20307749113744} is an apocalyptic number.

20307749113744 is the 4506412-nd square number.

It is an amenable number.

20307749113744 is a deficient number, since it is larger than the sum of its proper divisors (19413446093313).

20307749113744 is an frugal number, since it uses more digits than its factorization.

20307749113744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21280 (or 10638 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 52.

The spelling of 20307749113744 in words is "twenty trillion, three hundred seven billion, seven hundred forty-nine million, one hundred thirteen thousand, seven hundred forty-four".