18995396790349 has 16 divisors (see below), whose sum is σ = 21919766317056. Its totient is φ = 16123821692400.

The previous prime is 18995396790313. The next prime is 18995396790353. The reversal of 18995396790349 is 94309769359981.

It is a cyclic number.

It is not a de Polignac number, because 18995396790349 - 2¹³ = 18995396782157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18995396796349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2452897 + ... + 6633814.

It is an arithmetic number, because the mean of its divisors is an integer number (1369985394816).

Almost surely, 2^{18995396790349} is an apocalyptic number.

It is an amenable number.

18995396790349 is a deficient number, since it is larger than the sum of its proper divisors (2924369526707).

18995396790349 is a wasteful number, since it uses less digits than its factorization.

18995396790349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9089616.

The product of its (nonzero) digits is 3571283520, while the sum is 82.

The spelling of 18995396790349 in words is "eighteen trillion, nine hundred ninety-five billion, three hundred ninety-six million, seven hundred ninety thousand, three hundred forty-nine".