20335563193009 has 9 divisors (see below), whose sum is σ = 20368703226081. Its totient is φ = 20302477013520.

The previous prime is 20335563192991. The next prime is 20335563193021. The reversal of 20335563193009 is 90039136553302.

The square root of 20335563193009 is 4509497.

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

It can be written as a sum of positive squares in 4 ways, for example, as 18292172994225 + 2043390198784 = 4276935^2 + 1429472^2 .

It is not a de Polignac number, because 20335563193009 - 2²³ = 20335554804401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20335563193069) 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, 3052926139 + ... + 3052932799.

Almost surely, 2^{20335563193009} is an apocalyptic number.

20335563193009 is the 4509497-th square number.

20335563193009 is the 2254749-th centered octagonal number.

It is an amenable number.

20335563193009 is a deficient number, since it is larger than the sum of its proper divisors (33140033072).

20335563193009 is an frugal number, since it uses more digits than its factorization.

20335563193009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14676 (or 7338 counting only the distinct ones).

The product of its (nonzero) digits is 1968300, while the sum is 49.

Multiplying 20335563193009 by its sum of digits (49), we get a square (996442596457441 = 31566479²).

The spelling of 20335563193009 in words is "twenty trillion, three hundred thirty-five billion, five hundred sixty-three million, one hundred ninety-three thousand, nine".