18703644202441 has 9 divisors (see below), whose sum is σ = 20558603356039. Its totient is φ = 17003269663600.

The previous prime is 18703644202423. The next prime is 18703644202489. The reversal of 18703644202441 is 14420244630781.

The square root of 18703644202441 is 4324771.

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., 16849144962441 + 1854499240000 = 4104771^2 + 1361800^2 .

It is not a de Polignac number, because 18703644202441 - 2³³ = 18695054267849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18703644202391 and 18703644202400.

It is not an unprimeable number, because it can be changed into a prime (18703644202421) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 47375901 + ... + 47769061.

Almost surely, 2^{18703644202441} is an apocalyptic number.

18703644202441 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18703644202441 is the 4324771-st square number.

18703644202441 is the 2162386-th centered octagonal number.

It is an amenable number.

18703644202441 is a deficient number, since it is larger than the sum of its proper divisors (1854959153598).

18703644202441 is an frugal number, since it uses more digits than its factorization.

18703644202441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786344 (or 393172 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 46.

The spelling of 18703644202441 in words is "eighteen trillion, seven hundred three billion, six hundred forty-four million, two hundred two thousand, four hundred forty-one".